M16C80 Datasheet, PDF (137/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
16. Serial I/O
(UART3)
RxD3
RxD polarity
reversing circuit
Clock source selection
f1
Internal
f8
f32
Bit rate
generator
1 / (n2+1)
External
UART reception
1/16
Clock synchronous type
Reception
control circuit
UART transmission
1/16
Clock synchronous type
Transmission
control circuit
Clock synchronous type
(when internal clock is selected)
1/2
Receive
clock
Transmit
clock
Transmit/
receive
unit
TxD
polarity
reversing
circuit
CLK3
CTS3 / RTS3
CLK
polarity
reversing
circuit
Clock synchronous type
(when internal clock is selected)
CTS/RTS _{CTS/RTS disabled}
selected
Clock synchronous type
(when external clock is
selected)
RTS3
CTS/RTS disabled _CTS3
TxD3
Vss
(UART4)
RxD4
RxD polarity
reversing circuit
Clock source selection
f1
Internal
f8
f32
Bit rate
generator
1 / (n2+1)
External
UART reception
1/16
Clock synchronous type
Reception
control circuit
UART transmission
1/16
Clock synchronous type
Transmission
control circuit
Clock synchronous type
(when internal clock is selected)
1/2
Receive
clock
Transmit
clock
Transmit/
receive
unit
TxD
polarity
reversing
circuit
CLK4
CTS4 / RTS4
CLK
polarity
reversing
circuit
Clock synchronous type
(when internal clock is selected)
CTS/RTS _{CTS/RTS disabled}
selected
Clock synchronous type
(when external clock is
selected)
RTS4
TxD4
CTS/RTS disabled _CTS4
n3 : Values set to UART3 bit rate generator (BRG3)
Vss
n4 : Values set to UART4 bit rate generator (BRG4)
Figure 16.2 Block diagram of UARTi (i = 3, 4)
Rev.1.00 Aug. 02, 2005 ^{Page 126} of 329
REJ09B0187-0100