MB90330A Series
DS07-13734-9E
9
(Continued)
Pin no.
Pin name
I/O
Circuit
type*
Function
18
P45
G
General purpose input/output port.
A13
Function as the external address pin in non-multi-bus mode.
SIN1
Function as a data input pin for UART ch.1.
19
P46
G
General purpose input/output port.
A14
Function as the external address pin in non-multi-bus mode.
SOT1
Function as a data output pin for UART ch.1.
20
P47
G
General purpose input/output port.
A15
Function as the external address pin in non-multi-bus mode.
SCK1
Function as a clock I/O pin for UART ch.1.
81
P50
L
General purpose input/output port.
ALE
Function as the address latch enable signal pin in external bus mode.
82
P51
L
General purpose input/output port.
RD
Function as the read strobe output pin in external bus mode.
83
P52
L
General purpose input/output port.
WRL
Function as the data write strobe output pin on the lower side in external
bus mode. This pin functions as a general-purpose I/O port when the WRE
bit in the EPCR register is “0”.
84
P53
L
General purpose input/output port.
WRH
Function as the data write strobe output pin on the higher side in bus width
16-bit external bus mode. This pin functions as a general-purpose I/O port
when the WRE bit in the EPCR register is “0”.
85
P54
L
General purpose input/output port.
HRQ
Function as the hold request input pin in external bus mode. This pin
functions as a general-purpose I/O port when the HDE bit in the EPCR
register is “0”.
86
P55
L
General purpose input/output port.
HAK
Function as the hold acknowledge output pin in external bus mode. This pin
functions as a general-purpose I/O port when the HDE bit in the EPCR
register is “0”.
91
P56
L
General purpose input/output port.
RDY
Function as the external ready input pin in external bus mode. This pin
functions as a general-purpose I/O port when the RYE bit in the EPCR
register is “0”.
92
P57
L
General purpose input/output port.
CLK
Function as the machine cycle clock output pin in external bus mode. This
pin functions as a general-purpose I/O port when the CKE bit in the EPCR
register is “0”.
21, 22
P60, P61
C
General purpose input/output port. (With stand voltage of 5 V)
INT0, INT1
Function as external interrupt ch.0 and ch.1 input pins.