SN8P1829
8-Bit MCU build-in 12-bit ADC + PGIA + Charge-pump Reg 128 dots LCD driver
SONiX TECHNOLOGY CO., LTD
Page 121
Version 1.0
Bit CPRENB, CPON, and CPAUTO are Charge-Pump working mode control bit. By these three bits, Charge-Pump can
be set as OFF, Always ON, or Auto mode.
CPRENB
CPON CPAUTO
Charge-Pump
Status
Regulator
Status
CPSTS
AVDDR
PGIA, ADC, OPA
Power Supply
0
X
X
OFF
OFF
N/A
0V
VDD
1
0
0
OFF
ON
N/A
See Note1
See Note1
1
0
1
Auto Mode
ON
0/1
3.8V
3.8V
1
1
0
ON
ON
N/A
3.8V
3.8V
1
1
1
Reserved (Don’t set this mode)
In Auto Mode, Charge-Pump ON/OFF depended on VDD voltage.
Auto-Mode Description:
CPRENB
CPON CPAUTO
VDD
Charge-Pump
Status
CPSTS
Regulator
Status
AVDDR
Output
PGIA, ADC, OPA
Power Supply
>4.1V
OFF
0
ON
3.8V
3.8V
1
0
1
≦
4.1V
ON
1
ON
3.8V
3.8V
Note 1: When Charge-Pump is OFF and Regulator is ON, VDD voltage must be higher than 3.9V to make
sure AVDDR output voltage, PGIA, and ADC functions are working well.
CPRENB
CPON
CPAUTO
VDD
Charge-Pump
Status
Regulator
Status
AVDDR
Output
PGIA, ADC, OPA
Power Supply
>4.1V
OFF
ON
3.8V
3.8V
1
0
0
≦
4.1V
OFF
ON
Unknown
Unknown
Note 2: For normally application, set CP as Auto mode (CPAUTO = 1) is strongly recommended.
Note 3: If VDD is higher than 5.0V, don’t set Charge-Pump as Always ON mode.
Note 4: The recommend operating voltage of PGIA, OPA and ADC are 3.8V