DS07-16303-3E Datasheet, PDF (9/97 Pages) Fujitsu Component Limited. – 32-bit RISC Microcontroller CMOS FR30 Series

MB91121
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Pin no.
Pin name
66 CS1/PA1
67 CS2/PA2
68 CS3/PA3
69 CS4/PA4
70 CS5/PA5
71 CLK/PA6
72 NMI
73 MD3
74 RST
76 MD0
77 MD1
78 MD2
79 RDY/P80
80 BGRNT/P81
81 BRQ/P82
82 RD
83 WR0
84 WR1/P85
85 D16/P20
86 D17/P21
87 D18/P22
88 D19/P23
89 D20/P24
90 D21/P25
91 D22/P26
92 D23/P27
Circuit type
Function
Chip select 1 output (Low active) .
Chip select 2 output (Low active) .
Chip select 3 output (Low active) .
F
Chip select 4 output (Low active) .
Chip select 5 output (Low active) .
[PA1 to PA5] Can serve as a port when not used for signal output.
System clock output. This pin outputs the same clock frequency
F
as the external bus operating frequency.
[PA6] Can serve as a port when not used for signal output.
H
NMI (Non Maskable Interrupt) input (Low active) .
G
Mode pin 3.
Connect this pin directly to the VCC or VSS pin.
B
External reset input.
Mode pins 0 to 2.
G
These pins are set to MCU basic operation modes.
Connect this pin directly to the VCC or VSS pin.
External ready signal input. This pin inputs 0 when the bus cycle
C
being executed is not completed. It can serve as a port when not
used for that input.
External bus release request acknowledge output. This pin out-
F
puts the L signal when the eternal bus has been released. The pin
can serve as a port when not used for that output.
External bus release request input. Input 1 to this pin to release
C
the external bus. The pin can serve as a port when not used for
that input.
M
External bus read strobe.
M
External bus write strobe. The control signals and data bus byte
locations have the following relationships.
16-bit bus width 8-bit bus width
D31 to D24
WR0
WR0
F
D23 to D16
WR1
(Usable as port)
Note : WR1 remains in the Hi-Z state during a reset. For use with
a 16-bit bus width, add an external pull-up resistor.
External data bus bits 16 to 23.
C
These pins can be used as ports (P20 to P27) when the external
bus width has been set to 8 bits.
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