M16C26 Datasheet, PDF (121/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Serial I/O
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
UARTi transmit/receive control register 1 (i=0, 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
UiC1(i=0,1)
Address When reset
03A516,03AD16
0216
Bit
symbol
Bit name
TE Transmit enable bit
Function
(During clock synchronous
serial I/O mode)
Function
(During UART mode)
RW
0 : Transmission disabled 0 : Transmission disabled
1 : Transmission enabled 1 : Transmission enabled
TI
Transmit buffer
empty flag
RE Receive enable bit
0 : Data present in
transmit buffer register
1 : No data present in
transmit buffer register
0 : Reception disabled
1 : Reception enabled
0 : Data present in
transmit buffer register
1 : No data present in
transmit buffer register
0 : Reception disabled
1 : Reception enabled
RI
Receive complete flag 0 : No data present in
0 : No data present in
receive buffer register
receive buffer register
1 : Data present in
1 : Data present in
receive buffer register
receive buffer register
Nothing is assigned.
In an attempt to write to these bits, write 0 . The value, if read, turns out to be 0 .
UART2 transmit/receive control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2C1
Address
037D16
When reset
0216
Bit
symbol
Bit name
TE Transmit enable bit
Function
(During clock synchronous
serial I/O mode)
Function
(During UART mode)
RW
0 : Transmission disabled 0 : Transmission disabled
1 : Transmission enabled 1 : Transmission enabled
TI Transmit buffer
empty flag
RE Receive enable bit
0 : Data present in
transmit buffer register
1 : No data present in
transmit buffer register
0 : Reception disabled
1 : Reception enabled
0 : Data present in
transmit buffer register
1 : No data present in
transmit buffer register
0 : Reception disabled
1 : Reception enabled
RI Receive complete flag
0 : No data present in
receive buffer register
1 : Data present in
receive buffer register
U2IRS
UART2 transmit interrupt
cause select bit
0 : Transmit buffer empty
(TI = 1)
1 : Transmit is completed
(TXEPT = 1)
0 : No data present in
receive buffer register
1 : Data present in
receive buffer register
0 : Transmit buffer empty
(TI = 1)
1 : Transmit is completed
(TXEPT = 1)
U2RRM UART2 continuous
receive mode enable bit
0 : Continuous receive
mode disabled
1 : Continuous receive
mode enabled
Must always be "0"
U2LCH Data logic select bit
0 : No reverse
1 : Reverse
0 : No reverse
1 : Reverse
U2ERE Error signal output
enable bit
Must be fixed to 0
0 : Output disabled
1 : Output enabled
Figure 1.15.7. Serial I/O-related registers (4)
Renesas Technology Corp.
115