STMPE821_09 STMICROELECTRONICS [STMicroelectronics], STMPE821_09 Datasheet - Page 17

• Manufacturer Part Number: STMPE821_09
• Description: 8-channel capacitive touch key controller
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STMPE821
SYS_CFG_1
Address:
Type:
Reset:
Description:
SYS_CFG_2
Address:
Type:
Reset:
Description:
CLOCK 2
SENSOR
7
7
SENSOR
CLOCK 1
[7:4] RESERVED
[7:5] SENSOR CLOCK: See description in the table below.
[3] SLEEP:
[2] WARM_RESET:
[1] SOFT_RESET:
[0] HIBERNATE: Force the device into hibernation mode.
[4] RESERVED
[3] PWM CLOCK DISABLE:
[2] GPIO CLOCK DISABLE:
[1] FIFO CLOCK DISABLE:
[0] TOUCH CLOCK DISABLE:
6
6
RESERVED
0x03
R/W
0x00
The reset control register enables to reset the device
Write ‘1’ to enable sleep mode. hardware resets this bit to ‘0’ after it successfully enters sleep
mode.
Write ‘1’ to initiate a warm reset. Register content remains, state machine reset.
Write ‘1’ to initiate a soft reset. All registers content and state machines reset.
Write ‘1’ to enter the hibernate mode. Hardware resets this bit to ‘0’ after it successfully enters
hibernate mode.
0x04
R/W
0xEF
This register enables to switch off the clock supply
Write ‘1’ to disable the clock to PWM unit.
Write ‘1’ to disable the clock to GPIO unit. Note that GPIO clock is required for PWM operation.
Write ‘1’ to disable the clock to FIFO unit. This must be set to ‘0’ if touch interrupt is required.
Write ‘1’ to disable the clock to TOUCH unit.
SENSOR
CLOCK 0
5
5
4
4
System configuration 1
System configuration 2
−
PWM CLOCK
DISABLE
SLEEP
3
3
WARM_RESET
GPIO CLOCK
DISABLE
2
2
System and identification registers
SOFT_RESET
FIFO CLOCK
DISABLE
1
1
TOUCH CLOCK
HIBERNATE
DISABLE
0
0
17/55