UPD78361A Datasheet, PDF (39/88 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78361A, 78362A
3.9 SERIAL INTERFACE
The µPD78362A is provided with the following two independent serial interfaces:
• Asynchronous serial interface (UART)
• Clocked serial interface
• 3-line serial I/O mode
• Serial bus interface mode (SBI mode)
Since the µPD78362A contains a baud rate generator (BRG), any serial transfer rate can be set regardless
of the operating clock frequency. The baud rate generator is a block to generate the shift clock for the transmit/
receive serial interface, and is used commonly with the two channels of the serial interfaces.
The serial transfer rate can be selected in a range of 110 bps to 38.4 Kbps by the mode register.
Figure 3-15. Block Diagram of Asynchronous Serial Interface
Internal bus
RXB
Receive
buffer
ASIM
RXE PS1 PS0 CL SL SCK
RXD
Receive
shift
register
ASIS
PE FE OVE
TXS ^Transfer
shift
register
TXD
Receive
control
parity
check
INTSR
Transfer
INTSER ^control
parity
append
INTST
Transfer/
1—16
1—16
receive
baud rate
generator
output
fCLK/8
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