Datasheet

GPIOs I
2
C Registers
TPS65820
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.............................................................................................................................................................. SLVS663B MAY 2006 REVISED APRIL 2008
Table 17. Recommended GPIO Configuration Procedure (continued)
GPIO MODE I
2
C I
2
C REGISTER BIT SETTING ADDITIONAL DETAILS
REGISTERS
GPIO1=INPUT, GPIO12 AND GPIO1I/O=LO AND GPIO1INT=LO AND SM1/SM2 converter standby set at
SM1/SM2 STANDBY GPIO3 GPIO1LVL=HI AND GPIO1SM1=LO AND V(GPIO1) = HI
CONTROL GPIO1SMSBY=HI
GPIO1I/O=LO AND GPIO1INT=LO AND SM1/SM2 converter standby set at
GPIO1LVL=LO AND GPIO1SM1=LO AND V(GPIO1) = LO
GPIO1SMSBY=HI
The I
2
C registers that control GPIO-related functions are shown below. The HEX address for each register is
shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate
default initial power-up values.
B7 B6 B5 B4 B3 B2 B1 B0
GPIO12, ADDRESS=1B, ALL BITS R/W
Bit Name GPIO2I/O GPIO1I/O GPIO2OUT GPIO1OUT GPIO2LVL GPIO1LVL GPIO1SMSBY GPIO1SM1
Function GPIO2 MODE GPIO1 MODE SET GPIO2 SET GPIO1 GPIO2 EDGE GPIO1 EDGE GPIO 1 GPIO1
LEVEL LEVEL AND LEVEL AND LEVEL CONTROLS CONTROLS
(OUTPUT (OUTPUT DETECTION DETECTION SM1 AND SM2 SM1 ON/OFF
ONLY) ONLY) STANDBY
ON/OFF
When 0 INPUT INPUT LOW LOW RISING EDGE, RISING EDGE, DISABLED DISABLED
LO LEVEL LO LEVEL
When 1 OUTPUT OUTPUT HIGH HIGH FALLING FALLING ENABLED ENABLED
EDGE, HI EDGE, HI
LEVEL LEVEL
GPIO3, ADDRESS=1C, ALL BITS R/W
Bit Name GPIO3I/O GPIO3OUT LDO0_EN CHG_VOLT RTC_SET GPIO2 INT GPIO1 INT GPIO2SM2
Function GPIO3 MODE SET GPIO3 LDO0 ON/OFF CHARGE RTC_LDO GPIO2 GPIO1 SM2 ON/OFF
LEVEL CONTROL VOLTAGE OUTPUT TRIGGERS TRIGGERS CONTROL
(OUTPUT SAFETY BIT VOLTAGE INT:HI LO INT:HI LO
ONLY)
When 0 INPUT LOW OFF 4.20 V 3.1 V DISABLED DISABLED DISABLED
When 1 OUTPUT HIGH ON 4.36 V 2.6 V ENABLED ENABLED ENABLED
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