tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 124

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

R
2.
(a) When outputting
(b) When inputting
K
V
KK
VDD
Port PD
register in bits. When a pin which is pulled down to pin V
output or input, the following cautions are required.
voltage. Such processes as clamping with the diode as shown in figure 2.13.8. (a)
are necessary to prevent pin V
The input threshold is the same as that of the other usual input/output port.
However it is necessary to drive R
down to pin V
VFT output and usual input/output are controlled by VSEL of VFT control
When level “L” is output, a port which is pulled down to pin V
When the external data is input, the port output latch is cleared to “0”.
(a) At output
R1
R
Figure 2.13.8 External Circuit Interface
KK
.
88CU74-124
KK
voltage applying to the external circuit.
K
(typ. 80 kΩ) sufficiently because of pulled
R
K
V
KK
(b) At input
VDD
R1
R
KK
is used as usual
KK
TMP88CU74
2007-10-19
2003-02-17
is pin V
KK