M16C62_N Datasheet, PDF (375/621 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

UART
Mitsubishi microcomputers
M16C / 62 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Setting UARTi transmit/receive mode register (i=0 to 2)
b7
b0 UART0 transmit/receive mode register
0 1 0 0 0 1 0 1 U0MR [Address 03A016]
UART1 transmit/receive mode register
U1MR [Address 03A816]
b7
01
0
0
0
1
0
b0
1
UART2 transmit/receive mode register
U2MR [Address 037816]
Serial I/O mode select bit
b2 b1 b0
1 0 1 : Transfer data 8 bits long
Serial I/O mode select bit
b2 b1 b0
1 0 1 : Transfer data 8 bits long
Internal/external clock select bit
0 : Internal clock
Stop bit length select bit
0 : One stop bit
Odd/even parity select bit (Valid when bit 6 = “1”)
0 : Odd parity
Must be fixed “0” in UART mode
SS00ttoo::ppOObbnniitteelleessnnttooggpptthhbbssiitteelleecctt bbiitt
Odd/even parity select bit (Valid when bit 6 = “1”)
0 : Odd parity
Parity enable bit
1 : Parity enabled
Sleep select bit
0 : Invalid
PPaarriittyy eennaabbllee bbiitt
11 :: PPaarriittyy eennaabblleedd
TXD, RXD I/O polarity reverse bit
Usually set to “0”
Setting UARTi transmit/receive control register 0 (i = 0 to 2)
UART0 transmit/receive control register 0
b7
b0 _{U0C0 [Address 03A416]}
00
0
0
UART1 transmit/receive control register 0
U1C0 [Address 03AC16]
b7
b0 _{UART2 transmit/receive control register 0}
00
0
0
U2C0 [Address 037C16]
BRG count source select bit
b1 b0
0 0 : f1 is selected
0 1 : f8 is selected
1 0 : f32 is selected
1 1 : Inhibited
CTS/RTS function select bit (Valid when bit 4 = “0”)
0 : CTS function is selected
Transmit register empty flag
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit register
(transmission completed)
CTS/RTS disable bit
0 : CTS/RTS function enabled
Data output select bit
0 : TxDi pin is CMOS output
1 : TxDi pin is N-channel open-drain output
Must be “0” in UART mode
Must be “0” in UART mode
BRG count source select bit
b1 b0
0 0 : f1 is selected
0 1 : f8 is selected
1 0 : f32 is selected
1 1 : Inhibited
CTS/RTS function select bit (Valid when bit 4 = “0”)
0 : CTS function is selected
Transmit register empty flag
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit register
(transmission completed)
CTS/RTS disable bit
0 : CTS/RTS function enabled
Must be fixed “0” in UART mode
Transfer format select bit
0 : LSB first
Setting UART transmit/receive control register 2 and UART2 transmit/receive control register 1
b7
00
b0
UART transmit/receive control register 2
UCON [Address 03B016]
UART0 transmit interrupt cause select bit
1 : Transmission completed (TXEPT = 1)
UART1 transmit interrupt cause select bit
1 : Transmission completed (TXEPT = 1)
Invalid in UART mode
Invalid in UART mode
Invalid in UART mode
Must be “0” in UART mode
Separate CTS/RTS bit
0 : CTS/RTS shared pin
b7
00
b0
UART2transmit/receive control register 1
UCON [Address 037D16]
UART0 transmit interrupt cause select bit
1 : Transmission completed (TXEPT = 1)
Invalid in UART mode
Data logic select bit
0 : No reverse
Error signal output enable bit
0 : output enabled
Continued to the next page
Figure 2.5.9. Set-up procedure of transmission in UART mode (1)
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