參數(shù)資料
型號: LP3972SQX-5810
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC40
封裝: 5 X 5 MM, LLP-40
文件頁數(shù): 32/60頁
文件大小: 1171K
代理商: LP3972SQX-5810
SYSTEM CONTROL REGISTER 2 (SCR2)
System Control Register 2 (SCR2) 8h’81
Bit
7
6
5**
4
3
2
1
0
Designation
BBCS
SHBU
BPTR
WUP3
GPIO2
GPIO1
1
0
1
0
1
0
Note:
** denotes one time factory programmable EPROM registers for default values
System Control Register 2 (SCR2) 8h’81 Definitions
Bit
Access
Name
Description
7
R/W
BBCS
Sets GPIO1 as control input for Back Up battery charger
0 - Back Up battery Charger GPIO Disabled
1 - Back Up battery Charger GPIO Pin Enabled
6
R/W
SHBU
Shut down Back up battery to prevent battery drain during shipping
0 = Back up Battery Enabled
1 = Back up battery Disabled
5
R/W
BPTR
Bypass LDO_RTC Output Voltage to LDO3 Output Voltage Tracking
0 - LDO_RTC3 Tracking enabled
1 - LDO_RTC3 Tracking disabled, Default
4
R/W
WUP3
Spare Wakeup control input
0 - Active High
1 - Active Low
3:2
R/W
GPIO2
Configure direction and output sense of GPIO2 Pin
Data Code
2h’00
2h’01
2h’02
2h’03
GPIO2
Hi-Z
Output Low
Input
Output high
1:0
R/W
GPIO1
Configure direction and output sense of GPIO1 Pin
Data Code
2h’00
2h’01
2h’02
2h’03
GPIO1
Hi-Z
Output Low
Input
Output high
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