STMPE1601 STMicroelectronics, STMPE1601 Datasheet - Page 19

• Manufacturer Part Number: STMPE1601
• Description: 16-bit Enhanced Port Expander With Keypad And Pwm Controller Xpander Logic
• Manufacturer: STMicroelectronics

STMPE1601
SYS_CTRL_2
Address:
Type:
Reset:
Description:
7
[2:0] SLEEP:
RESERVED
[7] RESERVED
[6] RESERVED
[5] RESERVED
[4] VIO_OFF:
[3] AUTOSLEEP_EN:
R
6
0
0x03
R/W
0x00
System control register
Writing a ‘1’ to this bit is mandatory before shuting off the VIO supply while maintaining the
VCC supply.
This ensure that the level shifters for GPIOs 15-8 are properly powered down so as not to
induce high current and also not to affect the integrity of any external signals that are on the
bus where these GPIOs are connected.
“1” to enable auto-sleep feature. “0” to disable auto-sleep.
000 for 4 mS delay
001 for 16 mS delay
010 for 32 mS delay
011: for 64 mS delay
100: for 128 mS delay
101: for 256 mS delay
110: for 512 mS delay
111: for 1024 mS delay
5
System control register 2
VIO_OFF
R
4
0
AUTOSLEEP_EN
RW
3
0
SLEEP_2
RW
2
0
SLEEP_1
RW
1
0
System controller
SLEEP_0
RW
0
0
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