APPOTECH CW6632B - CW6632 B Bluetooth 3.0 Audio Player SOC Version; Copyright ©2015, Www.appotech.com. All Rights Reserved; RTCC Reset; Watchdog Reset

4 Reset Generation 27
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
Copyright ©2015, www.appotech.com. All Rights Reserved.
BORS[3:0]
Detected VDDLDO V
BORS[3:0]
Detected VDDLDO V
4'b0001
2.333
4'b1001
3.400
4'b0010
2.467
4'b1010
3.533
4'b0011
2.600
4'b1011
3.667
4'b0100
2.733
4'b1100
3.800
4'b0101
2.867
4'b1101
3.933
4'b0110
3.000
4'b1110
4.067
4'b0111
3.133
4'b1111
4.200
For the best operation, below shows a recommended operation for the LVD.
1. Select either VDDLDO or external pin to be monitored. Set VD1_ENB = 0 for VDDLDO or VD2_ENB = 0 for
external pin
2. Select the detection voltage by setting bits BORS[3:0]
3. Enable the LVD by setting LVD_ENB = 0
4. Wait for at least 30us for the internal band-gap and comparator to become stable
5. Enable the LVD output by setting LVD_OEB = 0
6. The EX_PIN detect voltage must be less than VDDIO
Register 4-1 LVDCON– LVD control
Position
7
6
5
4
3
2
1
0
Name
LVDIF
LVDRSTEN
LVDOE
Default
0
1
0
0
1
0
0
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LVDIF: LVD interrupt pending bit.
0 = When LVD threshold not detect. Cleared by writing a 0 to it
1 = When LVD threshold is detected
LVD_RSTEN: LVD Reset enable bit.
0 = LVD Reset is disabled
1 = LVD is enabled
LVD_OE: LVD output enable bit. Low active
0 = LVD output is enabled
1 = LVD output is disabled
4.2.2 RTCC Reset
CW6632B can be reset by RTCC second and alarm interrupt when IRTRSTEN bit in RTCON is set to 1.
4.2.3 Watchdog Reset
If Watchdog timer is enabled, and WDTCON [5] is not written by 1 within watchdog overflow time period, CW6632B
will be reset by Watchdog overflow.