tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 108

• 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 I/O Port Registers
8.3.1 Port P0 (P03 to P00)
System clock reset
(internal factor reset)
P0PRD0 read
P0PRD1 read
used as the high-frequency oscillation connection pin and the low-frequency oscillation connection pin.
the port is used in the input mode.
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
Port P0 contains a programmable pull-up resistor on the VDD side. This pull-up resistor can be used when
SYSCR1<OUTEN>
Table 8-3 Port P0
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)
Output latch
Output latch
P0PU0 write
P0CR0 write
P0DR0 write
P0PU1 write
P0CR1 write
P0DR1 write
P0FC0 write
Secondary
Reset signal
function
-
-
Figure 8-2 Port P0 (P00, P01)
-
-
-
-
Page 94
-
-
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
TMP89FM42
P00
(XIN)
P01
(XOUT)