tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 125

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

Input/Output Circuitry
Note: The TEST pin of the TMP88PU74 does not have a pull-down resistor. Fix the test pin at
(1) Control pins
TEST
Control Pin
RESET
STOP
XIN
XOUT
XTIN
XTOUT
/
INT
The input/output circuitries of the TMP88CU74 control pins are shown below.
low-level.
5
Output
Output
Input
Input
Input
Input
I/O
I/O
Address-trap-reset
Watchdog-timer-reset
System-clock-reset
Osc. enable
Osc. enable
VDD
VDD
STOP
/
INT
P20
XTIN
XIN
5
88CU74-125
Circuitry
R
R
f
f
R
R
IN
XTOUT
R
XOUT
R
R
O
O
R
VDD
IN
fc
ç
VDD
VDD
R
VDD
fs
ç
Resonator connecting pins
(high-frequency)
Resonator connecting pins
(low-frequency)
Hysteresis input
Hysteresis input
Pull-down resistor
R
R
R
R
R = 1 kΩ (typ.)
R = 1 kΩ (typ.)
R
R = 1 kΩ (typ.)
f
f
O
IN
IN
= 1.2 MΩ (typ.)
= 6 MΩ (typ.)
= 220 kΩ (typ.)
= 220 kΩ (typ.)
= 70 kΩ (typ.)
Remarks
TMP88CU74
2007-10-19
2003-02-17