9
MB89620R Series
s PIN DESCRIPTION
(Continued)
*1: DIP-64P-M01, DIP-64C-A06
*2: MDP-64C-P02
*3: FPT-64P-M06
*4: MQP-64C-P01
*5: FPT-64P-M03
*6: FPT-64P-M09
Pin no.
Pin name
Circuit
type
Function
SH-DIP*1
MDIP*2
QFP1*3
MQFP*4
LQFP*5
QFP2*6
30
23
22
X0
A
Crystal oscillator pins
31
24
23
X1
28
21
20
MOD0
B
Operating mode selection pins
Connect directly to VCC or VSS.
29
22
21
MOD1
27
20
19
RST
C
Reset I/O pin
This pin is an N-ch open-drain output type with a
pull-up resistor, and a hysteresis input type.
“L” is output from this pin by an internal reset source.
The internal circuit is initialized by the input of “L”.
56 to 49
49 to 42
48 to 41
P00/AD0 to
P07/AD7
D
General-purpose I/O ports
When an external bus is used, these ports function as
multiplex pins of lower address output and data I/O.
48 to 41
41 to 34
40 to 33
P10/A08 to
P17/A15
D
General-purpose I/O ports
When an external bus is used, these ports function as
upper address output.
40
33
32
P20/BUFC
F
General-purpose output-only port
When an external bus is used, this port can also be
used as a buffer control output by setting the BCTR.
39
32
31
P21/HAK
F
General-purpose output-only port
When an external bus is used, this port can also be
used as a hold acknowledge output by setting the
BCTR.
38
31
30
P22/HRQ
D
General-purpose output-only port
When an external bus is used, this port can also be
used as a hold request input by setting the BCTR.
37
30
29
P23/RDY
D
General-purpose output-only port
When an external bus is used, this port functions as a
ready input.
36
29
28
P24/CLK
F
General-purpose output-only port
When an external bus is used, this port functions as a
clock output.
35
28
27
P25/WR
F
General-purpose output-only port
When an external bus is used, this port functions as a
write signal output.
34
27
26
P26/RD
F
General-purpose output-only port
When an external bus is used, this port functions as a
read signal output.
33
26
25
P27/ALE
F
General-purpose output-only port
When an external bus is used, this port functions as
an address latch signal output.