Chapter 3 Memory; Table 3.1.3A Sample Recommended Setting Of Mode Pins And Mode Data; Table 3.1.3B Modes And Related External Pin Operations - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

Recommended setting
Table 3.1.3a lists a sample recommended setting of mode pins and mode data.

Table 3.1.3a Sample recommended setting of mode pins and mode data

Single chip
Internal ROM and external bus mode, 16-bit bus
Internal ROM and external bus mode, 8-bit bus
External ROM and external bus mode, 16-bit bus, vector 16 bus width
External ROM and external bus mode, 8-bit bus
Note: I/O signals appearing on an external pin connected to this module vary with the mode.
Table 3.1.3b lists the external pin function in each modes
Note: The high-order bits of an address and WRX, WRLX, WRHX, HAKX, HRQ, RDY, and
CLK can be used as ports depending on function selection.
MB90580 Series
Sample setting

Table 3.1.3b Modes and related external pin operations

Pin name
Single
chip
P07 to P00
P17 to P10
P27 to P20
P30
P31
P32 Port
P33
P34
P35
P36
P37
Function
External bus extension
8 bits 16 bits
AD07 to 00
A15 to 08 AD15 to 08
A23 to 16
ALE
RDX
WRX WRLX
Port WRHX
HRQ
HAKX
RDY
CLK
3.1 Memory Access Modes
MD2 MD1 MD0 M1
0 1 1
0 1 1
0 1 1
0 0 1
0 0 0
EPROM
write
D07 to 00
A15 to 08
A07 to 00
A16
CEX
OEX
PGMX
Unused
Chapter 3: Memory
M0 S0
×
0 0
0 1 1
0 1 0
1 0 1
1 0 0
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