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CHAPTER 1 OVERVIEW
1.6 Input-Output Circuits
Table 1.6-1 lists the input-output circuits.
■ Input-output Circuits
Table 1.6-1 I/O Circuit Types (1/4)
Type Circuit Remarks
A Oscillation circuit
High-speed oscillation feedback resistor =
approx. 1 MΩ
B Oscillation circuit
Low-speed oscillation feedback resistor =
approx. 10 MΩ
C Mask ROM device :
CMOS hysteresis input pin
Flash device:
CMOS input
D Mask ROM device :
CMOS hysteresis input pin
Pull-down resistor value: approx. 50 kΩ
Flash device:
CMOS input pin
No Pull-down
X1
X0
Xout
Standby control signal
X1A
X0A
Xout
Standby control signal
R
Hysteresis
input
R
Hysteresis
input
Pull-down
resistor