Renesas R8C/20 User Manual

R8C/20 Group, R8C/21 Group 15. Serial Interface
Rev.2.00 Aug 27, 2008 Page 270 of 458
REJ09B0250-0200
Figure 15.6 Registers U1SR and PMR
UART1 Function Select Register
Symbol Address After Reset
U1SR
00F5h Indeterminate
RW
b0
WO
b7
Function
Set to 03h w hen using UART1.
As a result, UART1 can be used as the clock asynchronous serial I/O.
Do not set values other than 03h.
When read, its content is indeterminate.
Port Mode Registe
r
Symbol Address After Reset
PMR
00F8h 00h
Bit Symbol Bit Name Function RW
IICSEL RW
0 : SSU function selects
1 : I
2
C bus function selects
Set to 0
0 : I/O port P6_6, P6_7
1 : TXD1, RXD1
Set to 0
—
Reserved bits
SSU/I
2
C bus sw itch bit
RW
b0
0
—
Reserved bits
U1PINSEL
Port TXD1/RXD1 switch bit
—
(b3-b0)
—
(b6-b5)
b3 b2
0
b1
00
b7 b6 b5 b4
00

Renesas R8C/20 Specifications

General

Brand	Renesas
Model	R8C/20
Category	Control Unit
Language	English