Description of fields within Sub-Register 0x2A:03 – TC_SARL
SAR_LTEMP
reg:2A:03
bits:15–8
Latest SAR reading for Temperature level. The 8-bit value reported here is the
temperature reading from the SAR A/D sampling of the DW1000 internal temperature
sensor. The LSB is approximately 0.8 °C. The value can be converted to an actual voltage by
employing the formula:
Temperature (°C )= ( (SAR_LTEMP – OTP_READ(V
temp
@ 23°C) ) x 1.14) + 23
This uses the stored 23°C reading in the OTP that was recorded during production test.
For additional details please refer to section 6.4 – Measuring IC temperature and voltage.
Bits marked ‘-’ in register 0x2A:03 are reserved and should always be written as zero to
avoid any malfunction of the DW1000.
7.2.43.3 Sub-Register 0x2A:06 – TC_SARW
Transmitter Calibration – SAR readings at last Wake-Up
Register file: 0x2A – Transmitter Calibration block, sub-register 0x06, is a 16-bit status register that contains
the following bitmapped sub-fields:
REG:2A:06 – TC_SARW– Transmitter Calibration SAR readings at last Wake-Up
Definition of the bit fields within Sub-Register 0x2A:06 – TC_SARW:
Description of fields within Sub-Register 0x2A:06 – TC_SARW
SAR_WBAT
reg:2A:06
bits:7–0
SAR reading of Voltage level taken at last wakeup event. The 8-bit value reported here is
the voltage reading from the SAR A/D sampling of the battery voltage monitor output
during wakeup. For this to be valid the DW1000 has to have been reset or woken from
sleeping with the ONW_RADC bit enabled in the (saved) Sub-Register 0x2C:00 –
AON_WCFG.
SAR_WTEMP
reg:2A:06
bits:15– 8
SAR reading of temperature level taken at last wakeup event. The 8-bit value reported here
is the temperature reading from the SAR A/D sampling of the DW1000 internal temperature
sensor during wakeup. For this to be valid the DW1000 has to have been reset or woken
from sleep with the ONW_RADC bit enabled in the (saved) Sub-Register 0x2C:00 –
AON_WCFG.
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