tmp88ch40img TOSHIBA Semiconductor CORPORATION, tmp88ch40img Datasheet - Page 109

• Manufacturer Part Number: tmp88ch40img
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

12. Asynchronous Serial interface (UART)
12.1 Configuration
It can connect the peripheral circuits through TXD and RXD pin. TXD and RXD pin are also used as the general
port. For TXD pin, the corresponding general port should be set output mode (Set its output control register to "1"
after its output port latch to "1"). For RXD pin, should be set input mode.
The TMP88CH40IMG has a asynchronous serial interface (UART) .
This UART and SIO can not use simultaneously because their input/output ports are common.
fc/13
fc/26
fc/52
fc/104
fc/208
fc/416
INTTC4
fc/96
INTRX
INTTX
UART control register 1
A
B
C
D
E
F
G
H
Figure 12-1 UART (Asynchronous Serial Interface)
S
UARTCRA
3
Y
2
Baud rate generator
Counter
Transmit/receive clock
Transmit data buffer
Shift register
TDBUF
Page 101
2
UART status register UART control register 2
2
UARTSR
4
Receive data buffer
Parity bit
Stop bit
Noise rejection
Shift register
UARTCRB
M
P
X
circuit
RDBUF
Y
S
2
A
B
C
fc/2
fc/2
fc/2
MPX: Multiplexer
6
7
8
TMP88CH40IMG
RXD
TXD