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STMPE812A bảng dữ liệu(PDF) 19 Page - STMicroelectronics

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STMPE812A
System and identification registers
Doc ID 18225 Rev 4
19/53
7
System and identification registers
SYS_CTRL
System control register
Address:
0x03
Type:
R/W
Reset:
0x0F
Description:
System control register.
If the clock supply to a particular functional block is turned off, the registers of these
modules are not accessible.
Table 8.
System and identification registers map
Address
Register name
Bit
Type
Reset
Function
0x00 - 01
CHIP_ID
16
R
0x0A812
Device identification
0x02
ID_VER
8
R
0x10
Revision number
0x10 for engineering sample
0x03
SYS_CTRL
8
R/W
0xF8
System control register
0x04
PORT_FUNCTION
8
R/W
0x00
Port function control register
0x06 - 07
SCRATCH_PAD
16
R/W
0x00
General purpose storage
register
76
5
4
3
2
1
0
RESERVED
SOFT_RESET
TSC_EN
RESERVED
PWM_OFF
GPIO_OFF
TSC_OFF
ADC_OFF
00
0
0
1
1
1
1
[7] RESERVED
[6] SOFT_RESET
Reset the 812 using serial communication
ALL REGISTER VALUES ARE RESET. State machines all back to POR states.
[5] TSC_EN
Write ‘1’ to enable operation of TSC. Write ‘0’ to disable it.
[4] RESERVED
[3] PWM_OFF
Writing ‘1’ switches OFF the clock supply to PWM
[2] GPIO_OFF
Writing ‘1’ switches OFF the clock supply to GPIO
[1] TSC_OFF
Writing ‘1’ switches OFF the clock supply to touchscreen controller
[0] ADC_OFF
Writing ‘1’ switches OFF the clock supply to ADC



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