Manual

RF22
Version: 0.1 Date: 12/23/2008
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63
Reset value = xxxxxxxx
Bit Name Function
7:0 adc[7:0] Internal 8 bit ADC Output Value.
Register 12h. Temperature Sensor Calibration
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name tsrange[1:0] entsoffs entstrim tstrim[3:0]
Type R/W R/W R/W R/W
Reset value = 00100000
Bit Name Function
7:6 tsrange[1:0] Temperature Sensor Range Selection.
(FS range is 0..1024 mV)
00: -40
o
C~64
o
C (full operating range), with 0.5
o
C resolution (1 LSB in the 8 bit ADC)
01: -40
o
C~85
o
C, with 1
o
C resolution (1 LSB in the 8 bit ADC)
11: 0
o
C ~85
o
C, with 0.5
o
C resolution (1 LSB in the 8 bit ADC)
10: -40
o
F ~216
o
F, with 1
o
F resolution (1 LSB in the 8 bit ADC)
5 entsoffs Temperature Sensor Offset to Convert from K to ºC.
4 entstrim Temperature Sensor Trim Enable.
3:0 tstrim[3:0] Temperature Sensor Trim Value.
Register 13h. Temperature Value Offset
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name
tvoffs[7:0]
Type R/W
Reset value = 00000000
Bit Name Function
7:0 tvoffs[7:0] Temperature Value Offset.
This value is added to the measured temperature value. (MSB, tvoffs[8]: sign bit)
Register 14h. Wake-Up Timer Period 1
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name Reserved
wtr[3:0]
wtd[1:0]
Type R/W R/W R/W
Reset value = xx000000
Bit Name Function
7:6 Reserved Reserved.
5:2 wtr[3:0] Wake Up Timer Exponent (R) Value*.
1:0 wtd[3:0] Wake Up Timer Exponent (D) Value*.
*Note: The period of the wake-up timer can be calculated as T
WUT
= (32 x M x2
R-D
) / 32.768 ms.
Register 15h. Wake-Up Timer Period 2
Bit D7 D6 D5 D4 D3 D2 D1 D0
Name
wtm[15:8]
Type R/W
Reset value = 00000000
Bit Name Function
7:0 wtm[15:8] Wake Up Timer Mantissa (M) Value*.
*Note: The period of the wake-up timer can be calculated as T
WUT
= (32 x M x2
R-D
) / 32.768 ms.