UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 236

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

12.4 Operation of Serial Interfaces
12.4.1 Operation stop mode
12.4.2 Asynchronous serial interface (UART) mode
rates.
of 600 bps to 115.2 kbps (@ f
and 300 bps to 38.4 kbps (@ fx = 8.38 MHz operation) or 600 bps to 76.8 kbps (@ f
234
The following three operating modes are available for the serial interfaces UART00 and UART01.
• Operation stop mode
• Asynchronous serial interface (UART) mode
• Infrared data transfer mode (UART00 only)
Serial transfer is not executed in this mode. Consequently, the power consumption can be reduced.
In the operation stop mode, the pins can be used as ordinary port pins.
(1) Register setting
In this mode, one byte of data is transmitted/received following a start bit, and full-duplex operation is possible.
A baud rate generator is incorporated, enabling communication to be performed at any of a wide range of baud
Programming baud rate generator control registers 0 and 1 (BRGC00 and BRGC01) allows a baud rate selection
(1) Register setting
The operation stop mode is set using asynchronous serial interface mode registers 0 and 1 (ASIM00 and
ASIM01).
ASIM00 and ASIM01 are set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears these registers to 00H.
Caution Before changing the operation mode, be sure to stop the serial transmission/reception.
Remark n = 0, 1
The UART mode is set using asynchronous serial interface mode registers 0 and 1 (ASIM00 and ASIM01),
asynchronous serial interface status registers 0 and 1 (ASIS00 and ASIS01), and baud rate generator control
registers 0 and 1 (BRGC00 and BRGC01).
ASIM0n TXE0n RXE0n PS0n1 PS0n0 CL0n SL0n ISRM0n IRDAM0n
Symbol
TXE0n
7
0
0
1
1
X
CHAPTER 12 SERIAL INTERFACES UART00 AND UART01
RXE0n
= 8.38 MHz operation) or 1200 bps to 153.6 kbps (@ f
6
0
1
0
1
Operation stopped
UART mode
(reception only)
UART mode
(transmission only)
UART mode
(transmission/reception)
5
Operation mode
4
User’s Manual U13029EJ7V1UD
3
2
Function of RxD00/P20,
Port function
Serial function
Port function
Serial function
RxD01/P22 pins
1
0
Address
FFA0H,
FFA4H
Function of TxD00/P21,
Port function
Serial function
X
X
TxD01/P23 pins
= 12 MHz operation) for UART01.
= 12 MHz operation) for UART00
After reset
00H
R/W
R/W