MC81F4332 Datasheet, PDF (151/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

UCONL
UART CONTROL LOW REGISTER
MC81F4432
00FDH
7
6
5
4
3
2
1
UCONL
UTP UTPS URPS URPER
UCLK
–
R/W R/W R/W R/W R/W R/W –
0
– Reset value: 00H
–
UTP
UTPS
URPS
URPER
UCLK
–
UART Transmit Parity-bit
Auto-Generation Enable Bit
UART Transmit Parity-bit Selection Bit
(for modes 2 and 3 only)
UART Receive Parity-bit Selection Bit
(for modes 2 and 3 only)
UART Receive Parity-bit Error Status Bit
(for modes 2 and 3 only)
UART Clock Selection Bits
bit1 – bit0
0: Disable parity-bit auto-generation
1: Enable parity-bit auto-generation
0: Even parity-bit
1: Odd parity-bit
0: Even parity-bit check
1: Odd parity-bit check
0: No parity-bit error
1: Parity-bit error
00: fxx/8
01: fxx/4
10: fxx/2
11: fxx/1
Not used for MC81F4x32
UDAT
UART DATA REGISTER
00FEH
Both UART receive and transmit buffers are both accessed via the UDAT register even two buffers
are physically separated. Writing to the UDAT register accesses the transmit buffer; reading the
UDAT register accesses the receive buffer.
UDAT
7
6
5
4
3
2
1
0
One byte register
Reset value: XXH
R/W R/W R/W R/W R/W R/W R/W R/W
A 8-bit data register for UART Rx/Tx data
BRDAT
UART BAUD RATE DATA REGISTER
00FFH
BRDAT
7
6
5
4
3
2
1
0
One byte register
Reset value: FFH
R/W R/W R/W R/W R/W R/W R/W R/W
A 8-bit data register for UART baud rate setting
October 19, 2009 Ver.1.35
151