Texas Instruments TPS65820 Evaluation Module TPS65820EVM TPS65820EVM Datenbogen
Produktcode
TPS65820EVM
GPIOs — I
2
C Registers
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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.
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
Copyright © 2006–2008, Texas Instruments Incorporated
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