tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 121

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

8.3
I/O Port Registers
RA006
8.3
8.3.1
I/O Port Registers
System clock reset
(internal factor reset)
P0PRD0 read
P0PRD1 read
as the high-frequency oscillation connection pin and the low-frequency oscillation connection pin.
port is used in the input mode.
Port P0 (P03 to P00)
Port P0 is a 4-bit input/output port that can be set to input or output for each bit individually, and it is also used
Port P0 contains a programmable pull-up resistor on the VDD side. This pull-up resistor can be used when the
Table 8-3 Port P0
SYSCR1<OUTEN>
Secondary func-
Input/output control
Input/output control
SYSCR1<STOP>
SYSCR2<XEN>
Function control
Pull-up control
Pull-up control
(for each bit)
(for each bit)
(for each bit)
(for each bit)
(for each bit)
(for each bit)
(for each bit)
P0CR0 write
Output latch
P0DR0 write
P0CR1 write
Output latch
P0DR1 write
P0PU0 write
P0FC0 write
P0PU1 write
Reset signal
tion
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Figure 8-2 Port P0 (P00, P01)
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Page 102
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VDD
VDD
XTOUT
P03
Programmable
pull-up resistor
Programmable
pull-up resistor
Note1 : R = 100Ω (typ.)
Note2 : Rf = 1.2MΩ (typ.)
Note3 : Ro = 0.5kΩ (typ.)
Note4 : R
XTIN
P02
IN3
= 50kΩ (typ.)
R
R
R
R
VDD
VDD
IN3
IN3
XOUT
P01
P00
XIN
Rf
Ro
TMP89FM42A
P00
(XIN)
P01
(XOUT)