MB90610A Series
(4) Port Pin Allocation
Ports 1, 2, 3, 4, and 5 on the MB90610A series share pins with the external bus. The pin functions are determined
by the bus mode and register settings.
Function
Non-multiplex mode
Multiplex mode
External address control
External address control
Pin
Enable (address)
External bus width
Disable (port)
Enable (address)
External bus width
Disable (port)
External bus width
External bus width
8-bit
16-bit
8-bit
16-bit
8-bit
16-bit
8-bit
16-bit
D07 to D00
AD07 to
D07 to D00
AD07 to AD00
AD00
P17 to P10/
D15 to D08/
AD15 to
D15 to
D08
D15 to
D08
AD15 to
AD08
AD15 to
AD08
Port
Port
A15 to A08
A15 to A08
AD08
P27 to P20/
A07 to A00
A07 to A00
A07 to A00
Port
P37 to P30/
A15 to A08
A15 to A08
A23 to A16
A15 to A08
Port
P47 to P40/
A23 to A16
A23 to A16
Port
P57/ALE
RD
ALE
RD
ALE
RD
P55/WRL
P54/WRH
P53/HRQ
P52/HAK
P51/RDY
P50/CLK
WRL
WRL
Port
WRH
Port
WRH
Port
WRH
Port
WRH
HRQ
HAK
RDY
CLK
HRQ
HAK
RDY
CLK
Note: The upper address, WRL, WRH, HAK, HRQ, RDY, and CLK can be set for use as ports by function selection.
27
FUJITSU [ FUJITSU ]
