
11
MB90670/675 Series
Pin no.
Pin name
Circuit
type
Function
LQFP*
1
QFP*
2
LQFP*
3
QFP*
4
10
12
7
9
P30
B
(CMOS)
General-purpose I/O port
This function is valid in single-chip mode.
Address latch enable output pin
This function is valid in modes where the external bus is
enabled.
General-purpose I/O port
This function is valid in single-chip mode.
Read strobe output pin for the data bus
This function is valid in modes where the external bus is
enabled.
General-purpose I/O port
This function is valid in single-chip mode or when WRL
pin output is disabled.
Write strobe output pin for the lower eight bits of the
data bus
This function is valid in modes where the external bus is
enabled and WRL pin output is enabled.
General-purpose I/O port
This function is valid in single-chip mode, external bus
eight-bit mode, or when WRH pin output is disabled.
Write strobe output pin for the upper eight bits of the
data bus
This function is valid in modes where the external bus
16-bit mode is enabled, and WRH pin output is
enabled.
General-purpose I/O port
This function is valid in single-chip mode and when the
hold function is disabled.
Hold request input pin
This function is valid in a mode where the external bus
is enabled and the hold function is enabled.
General-purpose I/O port
This function is valid in single-chip mode and when the
hold function is disabled.
Hold acknowledge output pin
This function is valid in a mode where the external bus
is enabled and the hold function is enabled.
General-purpose I/O port
This function is valid in single-chip mode and when the
external ready function is disabled.
Ready input pin
This function is valid in a mode where the external bus
is enabled and the external ready function is enabled.
ALE
11
13
8
10
P31
B
(CMOS)
RD
12
14
10
12
P32
B
(CMOS)
WRL
13
15
11
13
P33
B
(CMOS)
WRH
14
16
12
14
P34
B
(CMOS)
HRQ
15
17
13
15
P35
B
(CMOS)
HAK
16
18
14
16
P36
B
(CMOS)
RDY
*1: FPT-80P-M05
*2: FPT-80P-M06
*3: FPT-100P-M05
*4: FPT-100P-M06
(Continued)