MB90480/485 Series
Pin No.
I/O
circuit
Pin name
P54
Function
QFP*1 LQFP*2
type*3
This is a general purpose I/O port. In external bus mode, when the
HDE bit in the EPCR register is set to “1”, this pin functions as the
HRQ pin.
D
74
75
76
78
72
73
74
76
(CMOS)
In external bus mode, this pin functions as the hold request input
(HRQ) pin. When the HDE bit in the EPCR register is set to “0”, this
pin functions as a general purpose I/O port.
HRQ
P55
This is a general purpose I/O port. In external bus mode, when the
HDE bit in the EPCR register is set to “1”, this pin functions as the HAK
pin.
D
(CMOS)
In external bus mode, this pin functions as the hold acknowledge out-
put (HAK) pin. When the HDE bit in the EPCR register is set to “0”, this
pin functions as a general purpose I/O port.
HAK
P56
This is a general purpose I/O port. In external bus mode, when the
RYE bit in the EPCR register is set to “1”, this pin functions as the RDY
pin.
D
(CMOS)
In external bus mode, this pin functions as the external ready (RDY)
input pin. When the RYE bit in the EPCR register is set to “0”, this pin
functions as a general purpose I/O port.
RDY
P57
This is a general purpose I/O port. In external bus mode, when the
CKE bit in the EPCR register is set to “1”, this pin functions as the CLK
pin.
D
(CMOS)
In external bus mode, this pin functions as the machine cycle clock
(CLK) output pin. When the CKE bit in the EPCR register is set to
“0”, this pin functions as a general purpose I/O port.
CLK
P60 to P63
AN0 to AN3
P64 to P67
AN4 to AN7
P70
These are general purpose I/O ports.
These are the analog input pins for A/D converter.
These are general purpose I/O ports.
These are the analog input pins for A/D converter.
This is a general purpose I/O port.
38 to
41
H
36 to 39
41 to 44
25
(CMOS)
43 to
46
H
(CMOS)
G
27
28
29
30
31
(CMOS/H)
SIN0
This is the UART serial data input pin.
This is a general purpose I/O port.
P71
F
26
(CMOS)
SOT0
This is the UART serial data output pin.
This is a general purpose I/O port.
P72
G
27
(CMOS/H)
SCK0
This is the UART serial communication clock I/O pin.
This is a general purpose I/O port.
P73
G
28
(CMOS/H)
TIN0
This is the 16-bit reload timer event input pin.
P74
This is a general purpose I/O port.
This is the 16-bit reload timer output pin.
(Continued)
F
29
(CMOS)
TOT0
11
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