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MB89530 Series
16
I
I/O CIRCUIT TYPES
(Continued)
Type
Circuit
Remarks
A
Oscillator feedback resistance
High speed side
=
approx. 1 M
Low speed side
=
approx. 10 M
B
Hysteresis input
Pull-down resistance built-in to
MB89537/537C
MB89538/538C
C
Pull-up resistance approx. 50 k
Hysteresis input
D
CMOS I/O
Software pull-up resistance can be
used. Approx. 50 k
E
CMOS I/O
Software pull-up resistance can be
used. Approx. 50 k
Nch
Nch
X1 (X1A)
X0 (X0A)
Pch
Pch
R
Pch
Nch
Pch
Pch
Nch
R
Pull-up control
resistor
Pch
Pch
Nch
R
Pull-up control
resistors
Port input
Resource input