diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93c7a50ea..2a395a8ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 # Changelog
 All notable changes to this project are documented in this file.
 
+## [1.8.3] - 2020-03-20
+### Added
+- Added documentation pages for nRF52820.
+- Added possibility to use the nRF52833 DK in development for nRF52820. LEDs and buttons in this DK use GPIOs that are not present in the actual nRF52820 device, so accesses to these need special handling in the GPIO HAL.
+
+### Fixed
+- Fixed assertions that check input pin selections in the legacy SAADC driver. Now the VDDHDIV5 setting is handled properly.
+- Fixed the number of machine cycles per single delay loop for nRF52820 in the nrfx_coredep module.
+
 ## [1.8.2] - 2020-03-05
 ### Added
 - Added support for nRF52820.
diff --git a/doc/drv_supp_matrix.dox b/doc/drv_supp_matrix.dox
index de320a6a2..74da4c50b 100644
--- a/doc/drv_supp_matrix.dox
+++ b/doc/drv_supp_matrix.dox
@@ -3,53 +3,53 @@
 The following matrix shows which drivers are supported by specific Nordic SoCs.
 @{
 
-Driver           | nRF51 Series | nRF52810/nRF52811 | nRF52832     | nRF52833     | nRF52840     | nRF9160      |
------------------|--------------|-------------------| -------------| -------------| -------------| -------------|
-@ref nrf_aar     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_adc     |@tagGreenTick |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |
-@ref nrf_acl     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_bprot   |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagRedCross  |@tagRedCross  |@tagRedCross  |
-@ref nrf_ccm     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_clock   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_comp    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_dppi    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
-@ref nrf_ecb     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_ficr    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_gpio    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_gpiote  |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_i2s     |@tagRedCross  |@tagRedCross       |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_kmu     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
-@ref nrf_lpcomp  |@tagGreenTick |@tagRedCross       |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_mpu     |@tagGreenTick |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |
-@ref nrf_mwu     |@tagRedCross  |@tagRedCross       |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_nfct    |@tagRedCross  |@tagRedCross       |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_nvmc    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_pdm     |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_power   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_ppi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_pwm     |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_qdec    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_qspi    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagGreenTick |@tagRedCross  |
-@ref nrf_radio   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_rng     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_rtc     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_saadc   |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_spi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_spim    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_spis    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_spu     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
-@ref nrf_systick |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_swi_egu |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_temp    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_timer   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_twi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_twim    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_twis    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_uart    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_uarte   |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
-@ref nrf_usbd    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagRedCross  |
-@ref nrf_vmc     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
-@ref nrf_wdt     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+Driver           | nRF51 Series | nRF52810/nRF52811 | nRF52820     | nRF52832     | nRF52833     | nRF52840     | nRF9160      |
+-----------------|--------------|-------------------| -------------| -------------| -------------| -------------| -------------|
+@ref nrf_aar     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_adc     |@tagGreenTick |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |
+@ref nrf_acl     |@tagRedCross  |@tagRedCross       |@tagGreenTick |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_bprot   |@tagRedCross  |@tagGreenTick      |@tagRedCross  |@tagGreenTick |@tagRedCross  |@tagRedCross  |@tagRedCross  |
+@ref nrf_ccm     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_clock   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_comp    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_dppi    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
+@ref nrf_ecb     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_ficr    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_gpio    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_gpiote  |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_i2s     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_kmu     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
+@ref nrf_lpcomp  |@tagGreenTick |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_mpu     |@tagGreenTick |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |
+@ref nrf_mwu     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_nfct    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_nvmc    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_pdm     |@tagRedCross  |@tagGreenTick      |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_power   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_ppi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_pwm     |@tagRedCross  |@tagGreenTick      |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_qdec    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_qspi    |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |@tagRedCross  |
+@ref nrf_radio   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_rng     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_rtc     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_saadc   |@tagRedCross  |@tagGreenTick      |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_spi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_spim    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_spis    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_spu     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
+@ref nrf_systick |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_swi_egu |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_temp    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_timer   |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_twi     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_twim    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_twis    |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_uart    |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_uarte   |@tagRedCross  |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
+@ref nrf_usbd    |@tagRedCross  |@tagRedCross       |@tagGreenTick |@tagRedCross  |@tagGreenTick |@tagGreenTick |@tagRedCross  |
+@ref nrf_vmc     |@tagRedCross  |@tagRedCross       |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagRedCross  |@tagGreenTick |
+@ref nrf_wdt     |@tagGreenTick |@tagGreenTick      |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |@tagGreenTick |
 
 @}
 */
diff --git a/doc/nrf52820.dox b/doc/nrf52820.dox
new file mode 100644
index 000000000..a858b129d
--- /dev/null
+++ b/doc/nrf52820.dox
@@ -0,0 +1,66 @@
+/**
+@page nrf52820_drivers nRF52820 Drivers
+@{
+
+@ref nrf_aar
+
+@ref nrf_acl
+
+@ref nrf_ccm
+
+@ref nrf_clock
+
+@ref nrf_comp
+
+@ref nrf_ecb
+
+@ref nrf_ficr
+
+@ref nrf_gpio
+
+@ref nrf_gpiote
+
+@ref nrf_nvmc
+
+@ref nrf_power
+
+@ref nrf_ppi
+
+@ref nrf_qdec
+
+@ref nrf_radio
+
+@ref nrf_rng
+
+@ref nrf_rtc
+
+@ref nrf_spi
+
+@ref nrf_spim
+
+@ref nrf_spis
+
+@ref nrf_systick
+
+@ref nrf_swi_egu
+
+@ref nrf_temp
+
+@ref nrf_timer
+
+@ref nrf_twi
+
+@ref nrf_twim
+
+@ref nrf_twis
+
+@ref nrf_uart
+
+@ref nrf_uarte
+
+@ref nrf_usbd
+
+@ref nrf_wdt
+
+@}
+*/
diff --git a/drivers/src/nrfx_saadc.c b/drivers/src/nrfx_saadc.c
index e49150d44..903acbc0e 100644
--- a/drivers/src/nrfx_saadc.c
+++ b/drivers/src/nrfx_saadc.c
@@ -286,9 +286,16 @@ nrfx_err_t nrfx_saadc_channel_init(uint8_t                                  chan
     // Oversampling can be used only with one channel.
     NRFX_ASSERT((nrf_saadc_oversample_get() == NRF_SAADC_OVERSAMPLE_DISABLED) ||
                 (m_cb.active_channels == 0));
+
+#if defined(SAADC_CH_PSELP_PSELP_VDDHDIV5)
+    NRFX_ASSERT((p_config->pin_p <= NRF_SAADC_INPUT_VDDHDIV5) &&
+                (p_config->pin_p > NRF_SAADC_INPUT_DISABLED));
+    NRFX_ASSERT(p_config->pin_n <= NRF_SAADC_INPUT_VDDHDIV5);
+#else
     NRFX_ASSERT((p_config->pin_p <= NRF_SAADC_INPUT_VDD) &&
                 (p_config->pin_p > NRF_SAADC_INPUT_DISABLED));
     NRFX_ASSERT(p_config->pin_n <= NRF_SAADC_INPUT_VDD);
+#endif
 
     nrfx_err_t err_code;
 
diff --git a/hal/nrf_gpio.h b/hal/nrf_gpio.h
index 37c1a0bf4..af4934d92 100644
--- a/hal/nrf_gpio.h
+++ b/hal/nrf_gpio.h
@@ -854,6 +854,17 @@ __STATIC_INLINE bool nrf_gpio_pin_present_check(uint32_t pin_number)
 #ifdef P0_FEATURE_PINS_PRESENT
         case 0:
             mask = P0_FEATURE_PINS_PRESENT;
+#if defined(NRF52820_XXAA) && defined(DEVELOP_IN_NRF52833)
+            /* Allow use of the following additional GPIOs that are connected to LEDs and buttons
+             * on the nRF52833 DK:
+             * - P0.11 - Button 1
+             * - P0.12 - Button 2
+             * - P0.13 - LED 1
+             * - P0.24 - Button 3
+             * - P0.25 - Button 4
+             */
+            mask |= 0x03003800;
+#endif // defined(NRF52820_XXAA) && defined(DEVELOP_IN_NRF52833)
             break;
 #endif
 #ifdef P1_FEATURE_PINS_PRESENT
diff --git a/soc/nrfx_coredep.h b/soc/nrfx_coredep.h
index e86670ba0..3d9b2b49b 100644
--- a/soc/nrfx_coredep.h
+++ b/soc/nrfx_coredep.h
@@ -138,7 +138,7 @@ __STATIC_INLINE void nrfx_coredep_delay_us(uint32_t time_us)
         #if defined(NRF51)
             // The loop takes 4 cycles: 1 for SUBS, 3 for BHI.
             #define NRFX_COREDEP_DELAY_US_LOOP_CYCLES  4
-        #elif defined(NRF52810_XXAA) || defined(NRF52811_XXAA)
+        #elif defined(NRF52810_XXAA) || defined(NRF52811_XXAA) || defined(NRF52820_XXAA)
             // The loop takes 7 cycles: 1 for SUBS, 2 for BHI, 2 wait states
             // for each instruction.
             #define NRFX_COREDEP_DELAY_US_LOOP_CYCLES  7