参数资料
型号: S3P9664-SM
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24
封装: 0.300 INCH, SOP-24
文件页数: 132/148页
文件大小: 784K
代理商: S3P9664-SM
S3C9664/P9664 (Preliminary Spec)
I/O PORTS
9-7
PORT 2
Port 2 can be configured bit-programmable, general-purpose, I/O ports, only when USB ports are disabled
(USBSEL.0 = 0). Otherwise (USBSEL.1=1), port 2 is used for D+/D-.
However, in general purpose I/0 port mode. You can configure schmitt trigger input mode, rising edge external
interrupt and schmitt trigger input falling edge external interrupt mode with pull-up, N-channel open drain output
and push pull output mode with pull-up.
In normal operating mode, a reset clears the port 2 control registers (P2CONINT) to “00H”, configuring
P2.0–P2.1 as schmitt trigger input, rising edge external interrupt with pull-up resister.
Port 2 is accessed directly by writing or reading the port 2 data register. P2 (EFH, Page 0).
Port 2 Control Registers
P2CONINT, EFH, R/W (Page 0)
.3
.2
.1
.0
MSB
LSB
P2.1-P2.0
Interrupt
enable bit
P2.0
P2.1
P2CONINT:
Schmitt trigger input, rising edge external interrupt.
Schmitt trigger input, falling edge external interrupt
with pull-up.
N-channel open drain output mode.
Push-Pull output mode with pull-up
Port Mode Selection
0
1
0
1
7, 5
6, 4
P2.1-P2.0
Interrupt
pending bit
.7
.6
.5
.4
Figure 9-7. Port Control Registers (P2CONINT)
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