Specifications

S1C6S2N7 TECHNICAL HARDWARE EPSON I-31
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (I/O Ports)
I/O Ports (P00–P03)
The S1C6S2N7 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
port
Fig. 4.5.1
Configuration of I/O port
Pxx
Vss
Address
Address
Register
Input
control
I/O control
register
(IOC)
Data bus