Uart Registers - Fujitsu Semiconductor Controller MB89950/950A Hardware Manual

CHAPTER 10 UART
10.4

UART Registers

This section describes the registers of the UART.
I UART registers
SMC1 (Serial mode control register 1)
Address
0020
H
SRC (Serial rate control register)
Address
0021
H
SSD (Serial status and data register)
Address
0022
H
SIDR (Serial input data register)
Address
0023
H
SODR (Serial output data register)
Address
0023
H
SMC2 (Serial mode control register 2)
Address
0024
H
R/W : Readable and writable
R : Read-only
W : Write-only
— : Unused
X : Indeterminate
204
Figure 10.4-1 UART registers
Bit 7 Bit 6 Bit 5 Bit 4
PEN SBL MC1 MC0
R/W R/W R/W R/W
Bit 7 Bit 6 Bit 5 Bit 4
CR CS1
R/W R/W
Bit 7 Bit 6 Bit 5 Bit 4
RDRF ORFE TDRE TIE
R R R R/W
Bit 7 Bit 6 Bit 5 Bit 4
R R R R
Bit 7 Bit 6 Bit 5 Bit 4
W W W W
Bit 7 Bit 6 Bit 5 Bit 4
PSEN
R/W
Bit 3 Bit 2 Bit 1 Bit 0
SMDE SCKE SOE
R/W R/W R/W
Bit 3 Bit 2 Bit 1 Bit 0
CS0 RC2 RC1 RC0
R/W R/W R/W R/W
Bit 3 Bit 2 Bit 1 Bit 0
RIE TD8/TP RD8/RP
R/W R/W R
Bit 3 Bit 2 Bit 1 Bit 0
R R R R
Bit 3 Bit 2 Bit 1 Bit 0
W W W W
Bit 3 Bit 2 Bit 1 Bit 0
RSEL PDS1 PDS0
R/W R/W R/W
Initial value
00000-00
B
Initial value
--011000
B
Initial value
00100-1X
B
Initial value
XXXXXXXX
B
Initial value
XXXXXXXX
B
Initial value
--1-0-00
B