![](http://datasheet.mmic.net.cn/330000/MB90F482_datasheet_16437892/MB90F482_10.png)
MB90480/485 Series
10
(Continued)
Pin No.
Pin name
I/O
circuit
type*
3
Function
QFP*
1
LQFP*
2
21, 22
19, 20
P43, P44
F (CMOS)
MB90480
series
This is a general purpose I/O port.
A11, A12
In non-multiplex mode, this pin functions as an external
address pin.
P43, P44
F (CMOS)
MB90485
series
This is a general purpose I/O port.
A11, A12
In non-multiplex mode, this pin functions as an external
address pin.
MT00,
MT01
μ
PG output pin.
24
22
P45
F
(CMOS)
MB90480
series
This is a general purpose I/O port.
A13
In non-multiplex mode, this pin functions as an external
address pin.
P45
G
(
CMOS/H
)
MB90485
series
This is a general purpose I/O port.
A13
In non-multiplex mode, this pin functions as an external
address pin.
μ
PG input pin.
This is a general purpose I/O port.
EXTC*
4
25, 26
23, 24
P46, P47
F
(CMOS)
A14, A15
In non-multiplex mode, this pin functions as an external address pin.
OUT4/
OUT5
Output compare event output pins.
70
68
P50
D
(CMOS)
This is a general purpose I/O port. In external bus mode, this pin
functions as the ALE pin.
ALE
In external bus mode, this pin functions as the address load enable
(ALE) signal pin.
71
69
P51
D
(CMOS)
This is a general purpose I/O port. In external bus mode, this pin
functions as the RD pin.
RD
In external bus mode, this pin functions as the read strobe output (RD)
signal pin.
72
70
P52
D
(CMOS)
This is a general purpose I/O port. In external bus mode, when the WRE
bit in the EPCR register is set to “1”, this pin functions as the WRL pin.
WRL
In external bus mode, this pin functions as the lower data write strobe
output (WRL) pin. When the WRE bit in the EPCR register is set to “0”,
this pin functions as a general purpose I/O port.
73
71
P53
D
(CMOS)
This is a general purpose I/O port. In external bus mode with 16-bit bus
width, when the WRE bit in the EPCR register is set to “1”, this pin
functions as the WRH pin.
WRH
In external bus mode with 16-bit bus width, this pin functions as the
upper data write strobe output (WRH) pin. When the WRE bit in the
EPCR register is set to “0”, this pin functions as a general purpose I/O
port.