Product Specs

4
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Subject: Doc. No.: Rev: 0.6
UMC-STD31BPN Product Specification Page 28 of 55
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Form No.: 2-JT-00022-03_001
UMC-STD31BPN Product Specification
28
GO51
B:GPIO89
EINT89
DVDD18_IOBR
1.8V
AF4
GPIO89_1V8/O:PWM0/O:I2S5_MCK/B1:SDA1/O:
UTXD2
GO52
B:GPIO93
EINT93
DVDD18_IORB
1.8V
AE3
O:UTXD1/O:SPI1_B_CS1A
GO53
B:GPIO94
EINT94
DVDD18_IORB
1.8V
AF2
I1:URXD1/O:SPI1_B_CLK
GO54
B:GPIO95
EINT95
DVDD18_IORB
1.8V
AF3
I1:UCTS1/I0:SPI1_B_MI
GO55
B:GPIO96
EINT96
DVDD18_IORB
1.8V
AE2
O:URTS1/O:SPI1_B_MO/
3.5.2 Wake up/De-bounce
Table below shows available GPIO pins in the default software setting and internally pulled-down in the
device. 1.8V GPIO pins support the interrupt to wake NAD system up, and EINT0 to 15 also supports the
hardware de-bounce to filter the mechanical bounce noise.
Index
Symbol
Name
GPIO
Power Domain
Voltage
MT2731
Pin-out
Description
GO1
B:GPIO24
EINT24
DVDD18_IOLM
1.8V
N26
Wake up
GO2
B:GPIO13
EINT13
DVDD28_IOTCU
3.3V
AA24
Wake up/ Hardware De-
bounce
GO3
B:GPIO1
EINT1
DVDD18_IOLM
1.8V
M26
Wake up/ Hardware De-
bounce
GO4
B:GPIO15
EINT15
DVDD28_IOTCU
3.3V
AB24
Wake up/ Hardware De-
bounce
GO5
B:GPIO43
EINT43
DVDD28_IOAUD
3.3V
Y24
Wake up
GO6
B:GPIO28
EINT28
DVDD18_IOLM
1.8V
P25
Wake up
GO7
B:GPIO49
EINT49
DVDD28_IOTCU
3.3V
AA22
Wake up
GO8
B:GPIO47
EINT47
DVDD28_IOTCU
3.3V
AA23
Wake up
GO9
B:GPIO14
EINT14
DVDD28_IOTCU
3.3V
AB25
Wake up
GO10
B:GPIO40
EINT40
DVDD28_IOAUD
3.3V
Y25
Wake up
GO11
B:GPIO37
EINT37
DVDD28_IOAUD
3.3V
Y23
Wake up
GO12
B:GPIO38
EINT38
DVDD28_IOAUD
3.3V
W23
Wake up
GO13
B:GPIO48
EINT48
DVDD28_IOTCU
3.3V
AC23
Wake up
GO14
B:GPIO50
EINT50
DVDD28_IOTCU
3.3V
AB22
Wake up
GO15
B:GPIO7
EINT7
DVDD28_IOTCU
3.3V
AC25
Wake up/ Hardware De-
bounce