tmp88ps42ng TOSHIBA Semiconductor CORPORATION, tmp88ps42ng Datasheet - Page 173

• Manufacturer Part Number: tmp88ps42ng
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

14. Asynchronous Serial interface (UART)
14.1 Configuration
fc/13
fc/26
fc/52
fc/104
fc/208
fc/416
INTTC4
fc/96
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.
TXD1 are correspond to P44 and P45 pins, RXD2 and TXD2 are to P00 and P01 pins. But the synchronous serial
interface (SIO) also use P44 and P45 pins, therefore these P44 and P45 are not available for UART when SIO is on
working.
The TMP88PS42NG has a asynchronous serial interface (UART) . It can connect the peripheral circuits through
The asynchronous serial interface (UART) can select the connection pin with the peripheral circuits. RXD1 and
INTRXD
INTTXD
UART control register 1
A
B
C
D
E
F
G
H
S
UARTCRA
3
Y
2
Figure 14-1 UART (Asynchronous Serial Interface)
Baud rate generator
Counter
Transmit/receive clock
Transmit data buffer
Shift register
TDBUF
2
Page 163
UART status register
2
UARTSR
4
control register
IrDA control
IrDA output
IRDACR
Receive data buffer
Parity bit
Stop bit
Noise rejection
UART control
Shift register
UARTCRB
register 2
circuit
RDBUF
M
P
X
Y
S
2
C
A
B
UART pin
select register
M
M
P
X
P
X
UARTSEL
fc/2
fc/2
fc/2
6
7
8
RXD1
RXD2
TXD1
TXD2
TMP88PS42NG
MPX: Multiplexer