M32C8A Datasheet, PDF (235/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
17. Serial Interfaces
Start initial setting
I flag = 0
UiMR register: bits SMD2 to SMD0
CKDIR bit
STPS bit
PRY bit
PRYE bit
IOPOL bit
UiSMR register = 00h
UiSMR2 register = 00h
UiSMR3 register = 00h
UiSMR4 register = 00h
UiC0 register: bits CLK1 and CLK0
CRS bit
CRD bit
NCH bit
CKPOL bit = 0
UFORM bit
UiBRG register = m
UiC1 register: TE bit = 0
RE bit = 0
UiIRS bit
UiRRM bit = 0
UiLCH bit
bit 7 = 0
SiTIC register: bits ILVL2 to ILVL0
IR bit = 0
SiRIC register: bits ILVL2 to ILVL0
IR bit = 0
Pin settings in the Function Select Registers
I flag = 1
UiC1 register: TE bit = 1
RE bit = 1
End itinial setting
Interrupt disabled
UART mode⁽¹⁾ select bits
Clock select bit
Stop bit length select bit
Parity select bit
Parity enable bit
TXD, RXD I/O polarity switch bit
UiBRG register count source select bits
CTS function select bit
CTS function disable bit
Data output select bit
Bit order select bit⁽²⁾
m = 00h to FFh
Baud rate =
fj
16(m+1)
fj = f1, f8, f2n⁽³⁾, fEXT
Transmit operation disabled
Receive operation disabled
UARTi transmit interrupt request source select bit
Data logic select bit⁽⁴⁾
Transmit interrupt priority level select bits
Interrupt not requested
Receive interrupt priority level select bits
Interrupt not requested
Interrupt enabled
Transmit operation enabled
Receive operation enabled
Transmit operation starts by writing data to the UiTB register
Receive operation starts when the start bit is detected.
Read the UiRB register when the receive operation is completed.
i = 0 to 4
fEXT: clock input to the CLKi pin when the external clock is selected
NOTES:
1. Set bits SMD2 to SMD0 to the following: 100b (7 bits long), 101b (8 bits long), 110b (9 bits long).
2. A bit order can be selected when 8-bit data length is selected. Set to 0 when 7-bit or 9-bit data length is selected.
3. Bits CNT3 to CNT0 in the TCSPR register select no division (n = 0) or divide-by-2n (n = 1 to 15).
4. Whether data logic is inverted or not can be selected when 7-bit or 8-bit data length is selected. Set to 0 when 9-bit data
length is selected.
Figure 17.17 Register Settings in UART Mode
Rev.1.00 Jul 15, 2007 Page 218 of 352
REJ09B0385-0100