Oki ML63611, User Manual

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ML63611 User’s Manual
Chapter 12 Serial Port (SIO)
12 – 1
OPTION B (D): 1.5 V (3.0 V), With regulator
circuit for LCD bias
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
12. Serial Port (SIO)
12.1 Overview
The ML63611 has a built-in serial communication port (serial port) for either synchronous or asynchronous
communication.
The serial port implements the send and receive circuits in independent circuits, making it possible to send and
receive simultaneously.
The send and receive modes can be UART mode (asynchronous communication mode) or synchronous mode
(synchronous communication mode).
In synchronous mode an internal clock mode generates the shift clock internally, and an external clock mode
receives an external shift clock.
Table 12-1 shows the serial port modes.
Table 12-1 Serial Port Modes
Mode Baud rate
UART mode Can be set to a user-specified value
with timers 2, 3 (TM2, 3)
Internal clock mode 32.768 kHz
Send side
Synchronous
mode
External clock mode From external clock
UART mode
•
9600 bps
•
4800 bps
•
2800 bps
•
1200 bps
Internal clock mode 32.768 kHz
Serial port
R
e
ceiv
e sid
e
Synchronous
mode
External clock mode From external clock
12.2 Serial Port Configuration
Figure 12-1 indicates the serial port configuration.
The serial port consists of the send/receive clock generator circuits, the send/receive control registers, the buffer
registers to store send/receive data, send/receive data transfer shift registers, and the send/receive status registers.
PC.0/RXD is the send serial data input pin, PC.3/TXD is the send serial data output pin, PC.1/TXC is the serial
send clock I/O pin, and PC.2/RXC is the serial receive clock I/O pin. Set I/O and secondary functions with the
port control registers as needed for each communication mode.