M32C80 Datasheet, PDF (190/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
16. Serial I/O
UARTi Transmit/Receive Control Register 0 (i=0 to 4)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U0C0 to U4C0
Address
036C16, 02EC16, 033C16, 032C16, 02FC16
After Reset
0000 10002
Bit
Symbol
Bit Name
Function
RW
b1 b0
CLK0
0 0: Selects f1
RW
CLK1
UiBRG
Source
Count
Select
Bit⁽⁴⁾
0
1
1:
0:
Selects
Selects
f8
f2n(2)
1 1: Do not set to this value
RW
CRS
CST/RTS Function
Enabled when CRD=0
0: Selects CTS function
Select Bit
1: Selects RTS function
RW
0: Data in the transmit register
TXEPT
Transmit Register
Empty Flag
(during transmission)
1: No data in the transmit register
RO
(transmission is completed)
CRD
CTS/RTS Disable 0: Enables CTS/RTS function
Bit
1: Disables CTS/RTS function
RW
0: TxDi/SDAi and SCLi are ports for the
NCH
Data Output Select _{CMOS output}
Bit⁽¹⁾
1: TxDi/SDAi and SCLi are ports for the
RW
N-channel open drain output
CKPOL
CLK Polarity
Select Bit
0: Data is transmitted on the falling edge of
the transfer clock and data is received
on the rising edge
1: Data is transmitted on the rising edge of ^RW
the transfer clock and data is received
on the falling edge
Transfer Format 0: LSB first
UFORM _{Select Bit(3)}
1: MSB first
RW
NOTES:
1. P70/TxD2 and P71/SCL2 are ports for the N-channel open drain output, but not for the CMOS output.
2. The CNT3 to CNT0 bits in the TCSPR register select no division (n=0) or divide-by-2n (n=1 to 15).
3. The UFORM bit setting is enabled when the SMD2 to SMD0 bits in the UiMR register are set to
"0012" (clock syncronous serial I/O mode) or "1012" (UART mode, 8-bit transfer data).
Set the UFORM bit to "1" when setting the SMD2 to SMD0 bits to"0102" (I²C mode), or to "0" when
setting them to "1002" (UART mode, 7-bit transfer data) or "1102" (UART mode, 9-bit transfer data).
4. Set the UiBRG register after the CLK1 and CLK0 bit settings are changed.
Figure 16.4 U0C0 to U4C0 Registers
Rev. 1.00 Nov. 01, 2005 Page 171 of 330
REJ09B0271-0100