
Clock-Asynchronous Serial I/O
M30240 Group
Rev.1.00 Sep 24, 2003 Page 216 of 360
Figure 2.66: Set-up procedure of reception in UART mode (1)
Continued to the next page
UART transmit/receive control register 2
UCON [Address 03B0 16]
Invalid in UART mode
Must be fixed to “0” in UART mode
Invalid in UART mode
Reserved
Mustt always be "0"
b7
b0
00
Setting UART transmit/receive control register 2 and UART2 transmit/receive control register 1
UART2 transmit/receive control register 1
U2C1 [Address 037D 16]
Invalid in UART mode
Error signal output enable bit
0 : Output disabled
Data logic select bit
0 : No reverse
b7
b0
00
Setting UARTi transmit/receive mode register (i=0 to 2)
Internal/external clock select bit
1 : External clock
UART0 transmit/receive mode register
U0MR
[Address 03A016]
UART1 transmit/receive mode register
U1MR
[Address 03A816]
Valid when bit 6 = “1”
Parity enable bit
0 : Parity diabled
b7
b0
01
1
Sleep select bit
0 : Sleep mode deselected
Serial I/O mode select bit
1 0 1 : Transfer data 8 bits long
b2 b1 b0
00
Stop bit length select bit
0 : One stop bit
Parity enable bit
0 : Parity diabled
b7
b0
01
0
Serial I/O mode select bit
1 0 1 : Transfer data 8 bits long
b2 b1 b0
00
Stop bit length select bit
0 : One stop bit
UART2 transmit/receive mode register
U2MR
[Address 037816]
Valid when bit 6 = “1”
Setting UARTi transmit/receive control register 0 (i=0 to 2)
UART2 transmit/receive control register 0
U2C0 [Address 037C16]
Transfer format select bit
0 : LSB first
Must be fixed to “0” in UART mode
Transmit register empty flag
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit register
(transmission completed)
Must be fixed to “0” in UART mode
b7
b0
01
00
BRG count source select bit
0 0 : f 1 is selected
0 1 : f 8 is selected
1 0 : f 32 is selected
1 1 : Inhibited
b1 b0
CTS/RTS function select bit
(Valid when bit 4 = “0”)
1 : RTS function is selected
CTS/RTS disable bit
0 : CTS/RTS function enabled
UART0 transmit/receive control register 0
U0C0 [Address 03A4 16]
UART1 transmit/receive control register 0
U1C0 [Address 03AC 16]
b7
b0
01
00
BRG count source select bit
0 0 : f 1 is selected
0 1 : f 8 is selected
1 0 : f 32 is selected
1 1 : Inhibited
b1 b0
CTS/RTS function select bit
(Valid when bit 4 = “0”)
1 : RTS function is selected
CTS/RTS disable bit
0 : CTS/RTS function enabled
Transmit register empty flag
0 : Data present in transmit register
(during transmission)
1 : No data present in transmit register
(transmission completed)
TxD, RxD I/O Polarity reverse bit
Usually set to "0"
Must be fixed to "0" in UART mode