M16C30P_07 Datasheet, PDF (136/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
15. Serial Interface
Main clock
1/2 ^f2SIO
f1SIO
PCLK1
0
1
f1SIO or f2SIO
1/8
(UART1)
1/4
RXD1
RXD polarity
reversing circuit
Clock source selection
CLK1 or CLK0 CKDIR
f1SIO or f2SIO ⁰⁰
01
f8SIO
f32SIO ¹⁰
Internal
0
1
Extenal
U1BRG
register
1 / (n1+1)
UART reception SMD2 to SMD0
1/16 ^{010, 100, 101, 110}
Clock synchronous
type
001
Reception
control circuit
UART transmission
1/16 ^{010, 100, 101, 110}
Clock synchronous
type
001
Transmission
control circuit
Clock synchronous type
(when internal clock is selected)
1/2
0
Clock synchronous type
(when external clock is selected)
1
f8SIO
f32SIO
Receive
clock
Transmit
clock
Transmit/
receive
unit
CLK1
CTS1 / RTS1/
CTS0 / CLKS1
CKPOL
CLK
polarity
reversing
circuit
Clock output
pin select
Clock synchronous type
0 ^{CLKMD0 (when internal clock is selected)}
1
1
CTS/RTS
selected
CRS ₁
CTS/RTS disabled
0
CLKMD1
0
CTS/RTS disabled
0
1
n1: Values set to the U1BRG register
VSS ^CRD
PCLK1: Bit in the PCLKR register
SMD2 to SMD0, CKDIR: Bits in U1MR register
CLK1 to CLK0, CKPOL, CRD, CRS: Bits in U1C0 register
CLKMD0, CLKMD1, RCSP: Bits in UCON register
CKDIR
RTS1
0
1
RCSP
CTS1
CTS0 from UART0
Figure 15.2 UART1 Block Diagram
TXD
polarity
reversing
circuit
TXD1
Rev.1.22 Mar 29, 2007 Page 120 of 291
REJ09B0179-0122