UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 447

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Figure 16-3 Format of Asynchronous Serial Interface Mode Register (ASIM) and Asynchronous Serial Interface
ASIM2
ASIM
TXE2
TXE
Mode Register 2 (ASIM2)
7
RXE2
RXE
6
CHAPTER 16 ASYNCHRONOUS SERIAL INTERFACE/3-WIRE SERIAL I/O
PS21
PS1
5
PS20
PS0
4
CL2
CL
3
SL2
SL
2
ISRM2 SCK2
ISRM
1
SCK
0
ISRM2
SCK2
ISRM
PS21
TXE2
Address
SCK
0FF88H
0FF89H
CL2
PS1
TXE
SL2
SL
CL
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
External clock input (ASCK, ASCK2)
Internal clock (fxx/2)
Enabled
Disabled
1 bit
2 bits
7 bits
8 bits
Serial Clock Specification
Specification of Enabling/Disabling of
Reception Completion Interrupt
Generation in Case of Receive Error*
Stop Bit Length Specification
(Transmission Only)
Data Character Length Specification
RXE2
PS20
PS0
RXE
0
1
0
1
0
1
0
1
On Reset
00H
00H
No parity
Transmission = 0 parity addition
Reception = Parity error not
Odd parity
Even parity
Transmission/reception disabled,
or 3-wire serial I/O mode
Reception enabled
Transmission enabled
Transmission/reception enabled
Parity Bit Specification
Transmit/Receive Operation
R/W
R/W
R/W
generated
407