tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 130

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

8.3 I/O Port Registers
8. I/O Ports
RA005
8.3.8 Port PB (PB7 to PB4)
Peripheral
functions
UART0
used as the serial interface input/output and the UART input/output.
MOS output can be selected.
also needed. For details, refer to "8.4 Serial Interface Selecting Function".
SIO0
Port PB is an 4-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 interface or the UART, setting for serial interface selecting function is
Table 8-18 Port PB
Secondary
function
PBPRD read
SYSCR1<OUTEN>
PB7
SYSCR1<STOP>
Input/output control
-
Function control
PBOUTCR write
SCLK0, SO0, TXD0
Output control
(for each bit)
(for each bit)
(for each bit)
(for each bit)
Output latch
PBCR write
PBDR write
PBFC write
Reset signal
SCLK0
PB6
SCLK0, SI0, RXD0
Figure 8-10 Port PB
RXD0
TXD0
PB5
Functions enclosed by
the dotted line are for
PB6 to PB4 only.
SI0
0
1
S
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TXD0
RXD0
SO0
PB4
-
-
-
-
(Note2)
-
-
Note1 : R = 100Ω (typ.)
Note2 : Nch large current
Note3 : i = 4 to 7
-
-
R
TMP89FM42
PBi