MB90610A Series
(Continued)
Pin no.
Circuit
type
Pin name
Function
LQFP*1
QFP*2
71
73
P51
RDY
P52
HAK
P53
HRQ
P54
L
General purpose I/O port
This applies when the external ready function is disabled.
(TTL)
Ready input pin
This applies when the external ready function is enabled.
72
73
74
74
75
76
I
General purpose I/O port
This applies when the hold function is disabled.
(CMOS)
Hold acknowledge output pin
This applies when the hold function is enabled.
L
General purpose I/O port
This applies when the hold function is disabled.
(TTL)
Hold request input pin
This applies when the hold function is enabled.
I
General purpose I/O port
This applies in 8-bit external bus mode or when output is
disabled for the WR pin.
(CMOS)
WRH
Write strobe output pin for the upper 8 bits of the data bus
This applies in 16-bit external bus mode and when output is
enabled for the WR pin.
75
76
77
78
RST
P55
WRL
RD
G
External reset request input pin
(CMOS/H)
I
General purpose I/O port
This applies when output is disabled for the WR pin.
(CMOS)
Write strobe output pin for the lower 8 bits of the data bus
This applies when output is enabled for the WR pin.
77
78
79
80
J
Read strobe output pin for the data bus
ALE (address latch enabling) output pin
Power supply for the digital circuits
Ground level for the digital circuits
(CMOS)
ALE
VCC
J
(CMOS)
21, 82
23, 84
Power
supply
9, 40, 79 11, 42, VSS
81
Power
supply
*1: FPT-100P-M05
*2: FPT-100P-M06
10
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