參數(shù)資料
型號(hào): S1C63408F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP128
封裝: PLASTIC, QFP-128
文件頁數(shù): 96/151頁
文件大?。?/td> 1171K
代理商: S1C63408F0A0100
S1C63406/408 TECHNICAL MANUAL
EPSON
41
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
4.6 I/O Ports (P20–P23)
4.6.1 Configuration of I/O ports
The S1C63406/408 has four bits of general-purpose I/O ports.
Figure 4.6.1.1 shows the configuration of the I/O port.
Address
Data
register
Data
bus
P2X
Address
I/O control
register (IOC)
Pull-up control
register (PPL)
VDD
Fig. 4.6.1.1 Configuration of I/O port
The I/O port terminals P20–P23 are shared with the serial interface input/output terminals. The software
can select the function to be used.
At initial reset, these terminals are all set to the I/O port.
Table 4.6.1.1 shows the setting of the input/output terminals by function selection.
Table 4.6.1.1 Function setting of input/output terminals
Terminal
P20
P21
P22
P23
Terminal status
at initial reset
P20 (Input & pull-up)
P21 (Input & pull-up)
P22 (Input & pull-up)
P23 (Input & pull-up)
Serial I/F
Master
Slave
Async.
SIN(I)
SOUT(O) SOUT(O) SOUT(O)
SCLK(O) SCLK(I)
P22
P23
SRDY(O)
P23
When these ports are used as I/O ports, the ports can be set to either input mode or output mode indi-
vidually (in 1-bit unit). Modes can be set by writing data to the I/O control registers.
Refer to Section 4.11, "Serial Interface", for control of the serial interface.
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