Texas Instruments CC2541 User Manual

Battery Monitor Registers www.ti.com
BATTMON (0x6264) – Battery Monitor
Bit Name Reset R/W Description
7 – 0 R0 Reserved. Always read 0
6
BATTMON_OUT
0 R Result from the battery monitor.
1: Voltage is above value set in BATTMON_VOLTAGE.
0: Voltage is below the value set in BATTMON_VOLTAGE.
Note that the value of BATTMON_OUT is undefined except when BATTMON_PD is 0 and has
been 0 for 2 us.
5:1
BATTMON_VOLTAGE
11100 R/W Controls the trigger point for the battery monitor. The step size is 24 mV for the first 23 settings,
and then 169 mV (unless temperature-sense mode is enabled; see Section 13.2 for details).
Range to be used: 3–31
3: 1.93 V
4: 1.93 V + (4 – 3) × 0.024 V = 1.954 V
5: 1.93 V + (5 – 3) × 0.024 V = 1.978 V
6: 1.93 V + (6 – 3) × 0.024 V = 2.002 V
7: 1.93 V + (7 – 3) × 0.024 V = 2.026 V
8: 1.93 V + (8 – 3) × 0.024 V = 2.050 V
9: 1.93 V + (9 – 3) × 0.024 V = 2.074 V
10: 1.93 V + (10 – 3) × 0.024 V = 2.098 V
11: 1.93 V + (11 – 3) × 0.024 V = 2.122 V
12: 1.93 V + (12 – 3) × 0.024 V = 2.146 V
13: 1.93 V + (13 – 3) × 0.024 V = 2.170 V
14: 1.93 V + (14 – 3) × 0.024 V = 2.194 V
15: 1.93 V + (15 – 3) × 0.024 V = 2.218 V
16: 1.93 V + (16 – 3) × 0.024 V = 2.242 V
17: 1.93 V + (17 – 3) × 0.024 V = 2.266 V
18: 1.93 V + (18 – 3) × 0.024 V = 2.290 V
19: 1.93 V + (19 – 3) × 0.024 V = 2.314 V
20: 1.93 V + (20 – 3) × 0.024 V = 2.338 V
21: 1.93 V + (21 – 3) × 0.024 V = 2.362 V
22: 1.93 V + (22 – 3) × 0.024 V = 2.386 V
23: 1.93 V + (23 – 3) × 0.024 V = 2.410 V
24: 1.93 V + (24 – 3) × 0.024 V = 2.434 V
25: 1.93 V + (25 – 3) × 0.024 V = 2.458 V
26: 1.93 V + (26 – 3) × 0.024 V = 2.482 V
27: 2.482 V + (27 – 26) × 0.169 V = 2.651 V
28: 2.482 V + (28 – 26) × 0.169 V = 2.820 V
29: 2.482 V + (29 – 26) × 0.169 V = 2.989 V
30: 2.482 V + (30 – 26) × 0.169 V = 3.158 V
31 : 2.48 2V + (31 – 26) × 0.169 V = 3.327 V
0
BATTMON_PD
1 R/W
Turns on the battery monitor. Wait at least 2 µs before reading BATTMON_OUT.
0: Enable the battery monitor.
1: Disable the battery monitor.
One should turn the battery monitor off (BATTMON_PD = 1) after reading out the measurement
BATTMON_OUT in order to save power, as the battery monitor consumes power when enabled
(BATTMON_PD = 0).
MONMUX (0x61A6) – Monitor MUX
Bit Name Reset R/W Description
7:1 – - - Reserved
0
BATTMON_INPUT
0 R/W Determines the input to the battery moitor:
0: Supply voltage (AVDD5)
1: Voltage from the temperature sensor, which needs to be enabled using the
ATEST.ATESTCTRL register; described in Section 23.15.3
148
Battery Monitor SWRU191C– April 2009–Revised January 2012
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Texas Instruments CC2541 Specifications

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Brand	Texas Instruments
Model	CC2541
Category	Microcontrollers
Language	English