參數(shù)資料
型號(hào)： MB91121PFV
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP120
封裝： PLASTIC, LQFP-120
文件頁(yè)數(shù)： 90/100頁(yè)
文件大?。?/td> 2316K
代理商： MB91121PFV
MB91121 Series
DS07-16303-4E
9
66
67
68
69
70
CS1/PA1
CS2/PA2
CS3/PA3
CS4/PA4
CS5/PA5
F
Chip select 1 output (Low active) .
Chip select 2 output (Low active) .
Chip select 3 output (Low active) .
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.
71
CLK/PA6
F
System clock output. This pin outputs the same clock frequency
as the external bus operating frequency.
[PA6] Can serve as a port when not used for signal output.
72
NMI
H
NMI (Non Maskable Interrupt) input (Low active) .
73
MD3
G
Mode pin 3.
Connect this pin directly to the VCC or VSS pin.
74
RST
B
External reset input.
76
77
78
MD0
MD1
MD2
G
Mode pins 0 to 2.
These pins are set to MCU basic operation modes.
Connect this pin directly to the VCC or VSS pin.
79
RDY/P80
C
External ready signal input. This pin inputs 0 when the bus cycle
being executed is not completed. It can serve as a port when not
used for that input.
80
BGRNT/P81
F
External bus release request acknowledge output. This pin out-
puts the L signal when the eternal bus has been released. The pin
can serve as a port when not used for that output.
81
BRQ/P82
C
External bus release request input. Input 1 to this pin to release
the external bus. The pin can serve as a port when not used for
that input.
82
RD
M
External bus read strobe.
83
WR0
M
External bus write strobe. The control signals and data bus byte
locations have the following relationships.
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.
84
WR1/P85
F
85
86
87
88
89
90
91
92
D16/P20
D17/P21
D18/P22
D19/P23
D20/P24
D21/P25
D22/P26
D23/P27
C
External data bus bits 16 to 23.
These pins can be used as ports (P20 to P27) when the external
bus width has been set to 8 bits.
Pin no.
Pin name
Circuit type
Function
16-bit bus width
8-bit bus width
D31 to D24
WR0
D23 to D16
WR1
(Usable as port)
(Continued)
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