Fujitsu MB91401 Datasheet page 10

MB91401
(Continued)
Pin name Pin no.
D31 169
D30 110
D29 168
D28 109
D27 42
D26 218
D25 167
D24 108
D23 41
D22 166
D21 107
D20 40
D19 106
D18 39
D17 38
D16 105
D15 36
D14 165
D13 104
D12 35
D11 164
D10 103
D9 34
D8 216
D7 163
D6 102
D5 33
D4 162
D3 101
D2 32
D1 100
D0 31
CSX6 159
CSX1 98
CSX0 29
RDX 27
WRX3 96
WRX2 28
WRX1 97
WRX0 158
MCLKO 25
RDY 157
10
I/O
Polarity Circuit
Data input/output pins
I/O B
32 bits data input/output signal pin.
Chip select output pins
Nega-
OUT B 3-bit chip select signal pin.
tive
Output the "L" level when accessing to external memory.
Read strobe output pin
Nega-
OUT B Read strobing signal pin.
tive
Output the "L" level when read accessing.
Write strobing output pins
Nega-
OUT B Write strobing signal pin.
tive
Output the "L" level when write accessing.
Memory clock output pin
OUT F
Clock for peripheral resources pin.
External RDY input
Posi-
When the external bus is not completed, the bus cycle can
IN D
tive
be extended by inputting "0".
Prelminary
2004.11.12
Function/application
pin