tmp89fm82t TOSHIBA Semiconductor CORPORATION, tmp89fm82t Datasheet - Page 141

• Manufacturer Part Number: tmp89fm82t
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
Serial interface selection control register
Serial interface selection control register
SERSEL2
(0x0FCB)
(0x0F79)
SERSEL
Note 1: The operation for changing SERSEL, SERSEL2 must be executed while the applicable serial interface and timer counter
Note 2: It is recommended to clear the interrupt latch for the applicable serial interface immediately after changing SER-
Note 3: In case of timer counter measurement for RXD0/SIO input signal, set SERSEL<SRSEL2>="0" to assign UART0/SIO0 to
Note 4: In case P74,P75 is assigned to UART0/SIO0, TXD0,SO0 output become CMOS level (No open drain output).
TCA0SEL
SRSEL2
SRSEL0
Read/Write
Read/Write
Bit Symbol
Bit Symbol
After reset
operations are stopped. If SERSEL SERSEL2 is switched during operation of these peripheral functions, each peripheral
function may receive (transmit) unexpected data and operate improperly.
SEL<SRSEL0>. Since the Interrupt latches are common for INTRXD and INTSIO, if an interrupt occurs before or after
SERSEL<SRSEL0> is switched, it is difficult to tell which function has caused the interrupt.
P20,P21. If P74,P75 are selected by SERSEL<SRSEL2>="1", it is not able to do the measurement by timer counter.
After reset
TCA1SEL
16-bit timer counter A0 input switch-
ing
Select UART0/SIO0 input/output
port
Serial interface selection 0
16-bit timer counter A1 input switch-
ing
R/W
R/W
7
0
7
0
TCA0SEL
TCA1SEL
R/W
R/W
6
0
6
0
R
R
5
0
5
0
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00:
01:
10:
11:
00:
01:
10:
11:
0:
1:
00:
01:
10:
11:
P70 input (TCA0)
P21 input (also used as RXD0)
P26 input (also used as RXD1)
Reserved
Select P20, P21
Select P74, P75
Select UART0, SEI (assign UART0 to IL6,IL7)
Select UART0, UART1 (assign UART0 to IL6,IL7)
Select SIO0, SEI (assign SIO0 to IL6)
Select SIO0,UART1 (assign SIO0 to IL6)
SRSEL2
P71 input (TCA1)
P21 input (also used as RXD0)
P26 input (also used as RXD1)
Reserved
R/W
R
4
0
4
0
-
R
R
3
0
3
0
-
R
R
2
0
2
0
-
R/W
R
1
0
1
0
-
TMP89FM82T
SRSEL0
R/W
R
0
0
0
0