NEC mPD780065 Series Preliminary User's Manual page 190

Figure 13-2. Format of Asynchronous Serial Interface Mode Register (ASIM0)
Address: FFA0H After reset: 00H
Symbol 7
ASIM0 TXE0
TXE0
0
0
1
1
PS01
0
0
1
1
CL0
0
1
SL0
0
1
ISRM0
0
1
IRDAM0
0
1
Notes 1. The UART/infrared data transfer mode specification is controlled by TXE0 and RXE0.
2. When using infrared data transfer mode, be sure to set "10H" to the baud rate generator control register
(BRGC0).
Caution Do not switch the operation mode until the current serial transmit/receive operation has
stopped.
190
CHAPTER 13 SERIAL INTERFACE (UART0)
R/W
6 5
RXE0 PS01 PS00
RXE0 Operation mode
0 Operation stop
1 UART mode
(receive only)
0 UART mode
(transmit only)
1 UART mode
(transmit and receive)
PS00
0 No parity
1 Zero parity always added during transmission
No parity detection during reception (parity errors do not occur)
0 Odd parity
1 Even parity
Character length specification
7 bits
8 bits
Stop bit length specification for transmit data
1 bit
2 bits
Receive completion interrupt control when error occurs
Receive completion interrupt request is issued when an error occurs
Receive completion interrupt request is not issued when an error occurs
Operation specified for infrared data transfer mode
UART (transmit/receive) mode
Infrared data transfer (transmit/receive) mode
Preliminary User's Manual U13420EJ2V0UM00
4 3 2
CL0 SL0
RxD0/P73 pin function
Port function (P73)
Serial function (RxD0)
Port function (P73)
Serial function (RxD0)
Parity bit specification
Note 2
1 0
ISRM0 IRDAM0
TxD0/P72 pin function
Port function (P72)
Serial function (TxD0)
Note 1