tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 129

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

8.3
I/O Port Registers
RA006
8.3.3
used as the serial bus interface input/output, the serial interface input/output, the UART input/output and the on-
chip debug function.
MOS output can be selected. Port P2 contains a programmable pull-up resistor on the VDD side. This pull-up
resistor can be used when the port is used in the input mode or as a sink open drain output.
selecting function is also needed. For details, refer to "8.4 Serial Interface Selecting Function".
Port P2 (P27 to P20)
Port P2 is an 8-bit input/output port that can be set to input or output for each bit individually, and it is also
The output circuit has the P-channel output control function and either the sink open drain output or the C-
When this port is used as the serial bus interface, the serial interface or the UART, setting for serial interface
For the on-chip debug function, refer to the chapter of "On-chip Debug Function (OCD)".
Table 8-8 Port P2
Secondary func-
tion
P27
-
P26
-
SCLK0
P25
Page 110
SCL0
P24
SI0
SDA0
SO0
P23
SCLK0
P22
OCDIO
RXD0
TXD0
P21
SI0
OCDCK
RXD0
TXD0
SO0
P20
TMP89FM42A