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2.2. Pin Description
S240 S200 S161
Pin
Name
23
19
16
VDD
24
20
16
VDD_RTC PWR RTC Power (<3.3V)
1
1
1
32KOSCO
2
2
2
32KOSCI
3
3
3
VSS
4
4
4
NRST
5
5
5
GPIOC1
6
GPIOC0
7
6
6
GPIOB7
8
7
7
GPIOB6
9
8
8
GPIOB5
10
9
9
GPIOB4
11
10
GPIOB3
12
GPIOB2
13
11
10
GPIOB1
14
12
11
GPIOB0
15
13
12
GPIOA7
16
14
13
GPIOA6
17
15
GPIOA5
18
16
GPIOA4
19
17
14
GPIOA3
20
GPIOA2
21
GPIOA1
22
18
15
GPIOA0
(a) All GPIOs have Schmitt trigger input.
(b) When use Slave IIC or 8051 P1.x (or UART), the external circuit need pull high(4.7k )
(c) GPIOA3, GPIOA2, GPIOA1, GPIOA0 MAX input are +3.6v(=3.3v+0.3v)
and the other GPIOs MAX input is +5v (5v tolerant PAD)
Copyright© 2006 Weltrend Semiconductor, Inc. All Rights Reserved.
Weltrend reserves right to modify all information contained in this document without notice.
WT6702F Data Sheet
I/O
PWR Power 3.3V
O
32kHz oscillator output
I
32kHz oscillator input
GND Ground
I
Reset pin, active low (internal pull high)
I/O PWM1 output. Shared with GPIO C1
I/O PWM0 output. Shared with GPIO C0
I/O 8051 UART RXD or external IRQ3 interrupt input. Shared with GPIO
B7
I/O 8051 UART TXD or external IRQ2 interrupt input. Shared with GPIO
B6
I/O HIN input. Shared with GPIO B5
I/O VIN input. Shared with GPIO B4
I/O 8051 P1.3 or external IRQ1 interrupt input. Shared with GPIO B3
I/O 8051 P1.2 or external IRQ0 interrupt input. Shared with GPIO B2
nd
I/O 2
slave IIC SDA2. Shared with GPIO B1
nd
I/O 2
slave IIC SCL2. Shared with GPIO B0
st
I/O 1
slave IIC SDA1. Shared with GPIO A7
st
I/O 1
slave IIC SCL1. Shared with GPIO A6
rd
I/O 3
slave IIC SDA or 8051 P1.1. Shared with GPIO A5
rd
I/O 3
slave IIC SCL or 8051 P1.0. Shared with GPIO A4
I/O Key pad ADC input3 or IR detector input. Shared with GPIO A3
I/O Key pad ADC input2. Shared with GPIO A2
I/O Key pad ADC input1. Shared with GPIO A1
I/O Key pad ADC input0. Shared with GPIO A0
- 6 -
Function Description
v0.93
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