參數(shù)資料
型號(hào): S1C60L02F
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 0.08 MHz, MICROCONTROLLER, PQFP60
封裝: PLASTIC, QFP6-60
文件頁(yè)數(shù): 33/102頁(yè)
文件大?。?/td> 674K
代理商: S1C60L02F
28
EPSON
S1C60N02 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
I/O Ports (P00–P03)
The S1C60N02 Series has a 4-bit general-purpose I/O port.
Figure 4.5.1 shows the configuration of the I/O port. The
four bits of the I/O port P00–P03 can be set to either input
mode or output mode. The mode can be set by writing data
to the I/O control register (IOC).
4.5
Configuration of I/O
ports
Fig. 4.5.1
Configuration of I/O port
Input or output mode can be set for the four bits of I/O port
P00–P03 by writing data into I/O control register IOC.
To set the input mode, "0" is written to the I/O control
register. When an I/O port is set to input mode, its imped-
ance becomes high and it works as an input port. However,
the input line is pulled down when input data is read.
The output mode is set when "1" is written to the I/O control
register (IOC). When an I/O port set to output mode works
as an output port, it outputs a high signal (VDD) when the
port output data is "1", and a low signal (VSS) when the port
output data is "0".
After an initial reset, the I/O control register is set to "0",
and the I/O port enters the input mode.
I/O control register
and I/O mode
Address
Register
Input
control
I/O control
register
(IOC)
Data
bus
Pxx
VSS
Address
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