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R8C/20 Datasheet(PDF) 286 Page - Renesas Technology Corp

Part # R8C/20
Description  MCU R8C FAMILY / R8C/2x SERIES
PDF  501 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C/20 Datasheet(HTML) 286 Page - Renesas Technology Corp

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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 Register
Symbol
Address
After Reset
PMR
00F8h
00h
Bit Symbol
Bit Name
Function
RW
IICSEL
RW
0 : SSU function selects
1 : I2C bus function selects
Set to 0
0 : I/O port P6_6, P6_7
1 : TXD1, RXD1
Set to 0
—
Reserved bits
SSU/I2C bus sw itch bit
RW
b0
0
—
Reserved bits
U1PINSEL
Port TXD1/RXD1 sw itch bit
—
(b3-b0)
—
(b6-b5)
b3 b2
0
b1
0
0
b7 b6 b5 b4
00



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