tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 134
tmp89fm42
Manufacturer Part Number
tmp89fm42
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42.pdf
(408 pages)
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8.4 Serial Interface Selecting Function
8. I/O Ports
RA005
Table 8-20 Select input/output port and interrupt
<SRSEL0
SERSEL
UART input/output change control register
>
UATCNG
(0x0F57)
00:
01:
10:
11:
Note 2: It is recommended to clear the interrupt latch for the applicable serial interface immediately after changing SERSEL. Inter-
Note 1: The operation for changing UATCNG must be executed while the applicable serial interface operations are stopped.
Note 1: Can be used as a port. (Set the function register (PxFC) to "0".)
<SRSEL2
SERSEL
0 or 1:
>
rupt latches are common to INTRXD and INTSIO and to INTSBI and INTSIO. Therefore, if an interrupt occurs before or
after SERSEL is switched, it is difficult to tell which function has caused the interrupt.
UAT1IO
UAT0IO
Read/Write
Bit Symbol
0:
1:
0:
1:
0:
1:
After reset
UATCNG
<UAT0IO
0 or 1:
0 or 1:
0 or 1:
>
Select UART1 input/ output port
Select UART0 input/ output port
0:
1:
0:
1:
0:
1:
0:
1:
TXD0
RXD0
TXD0
RXD0
Note
Note
Note
SO0
PB4
1
1
1
R
7
0
-
RXD0
RXD0
TXD0
TXD0
Note
Note
Note
PB5
SI0
1
1
1
R
6
0
SCLK
-
Note
Note
Note
Note
Note
PB6
UART0/SIO0
1
1
1
1
1
0
TXD0
RXD0
TXD0
RXD0
Note
Note
Note
SO0
P20
1
1
1
0:
1:
0:
1:
R
5
0
-
Page 120
P91
P90
P21
P20
<SERSEL2>="0"
RXD0
TXD0
RXD0
TXD0
Note
Note
Note
Port
P21
SI0
1
1
1
SERSEL
SCLK
Note
Note
Note
Note
Note
P22
R
4
0
-
1
1
1
1
0
1
RXD pin
Reserved
PB5
PB4
SDA0
SDA0
<SERSEL2>="1"
SO0
P23
SERSEL
I2C0/SIO0
R
3
0
-
SCL0
SCL0
P24
SI0
SCLK
Note
Note
P25
P90
P91
P20
P21
<SERSEL2>="0"
1
0
1
R
2
0
-
SERSEL
INTTXD0
INTTXD0
IL7
-
UAT1IO
R/W
TXD pin
1
0
INTRXD0
INTRXD0
PB4
PB5
<SERSEL2>="1"
INTSIO0
Interrupt
IL6
TMP89FM42
SERSEL
UAT0IO
R/W
0
0
INTSIO0
INTSBI0
INTSBI0
IL15
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