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參數資料
| 型號： | MB89855RP-SH |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Octal Bus Transceivers With 3-State Outputs 20-CDIP -55 to 125 |
| 中文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDIP64 |
| 封裝： | SHRINK, PLASTIC, DIP-64 |
| 文件頁數： | 7/48頁 |
| 文件大小： | 677K |
| 代理商： | MB89855RP-SH |
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MB89850R Series
7
I
PIN DESCRIPTION
(Continued)
*1: DIP-64P-M01, DIP-64C-A06
*2: FPT-64P-M06, FPT-64C-A02
Pin no.
Pin name
Circuit
type
Function
SH-DIP
*1
QFP
*2
30
23
X0
A
Crystal oscillator pins (10 MHz)
31
24
X1
28
21
MOD0
B
Operating mode selection pins
Connect directly to V
CC
or V
SS
.
29
22
MOD1
27
20
RST
C
Reset I/O pin
This pin is an N-ch open-drain output type with a pull-up
resistor, and a hysteresis input type. “L” is output from this
pin by an internal reset source. The internal circuit is
initialized by the input of “L”.
56 to 49
49 to 42
P00/AD0 to
P07/AD7
D
General-purpose I/O ports
When an external bus is used, these ports function as
multiplex pins of lower address output and data I/O.
48 to 41
41 to 34
P10/A08 to
P17/A15
D
General-purpose I/O ports
When an external bus is used, these ports function as
upper address output.
40
33
P20/BUFC
F
General-purpose output port
When an external bus is used, this port can also be used
as a buffer control output.
39
32
P21/HAK
F
General-purpose output port
When an external bus is used, this port can also be used
as a hold acknowledge output.
38
31
P22/HRQ
D
General-purpose output port
When an external bus is used, this port can also be used
as a hold request input.
37
30
P23/RDY
D
General-purpose output port
When an external bus is used, this port functions as a
ready input.
36
29
P24/CLK
F
General-purpose output port
When an external bus is used, this port functions as a
clock output.
35
28
P25/WR
F
General-purpose output port
When an external bus is used, this port functions as a
write signal output.
34
27
P26/RD
F
General-purpose output port
When an external bus is used, this port functions as a
read signal output.
33
26
P27/ALE
F
General-purpose output port
When an external bus is used, this port functions as an
address latch signal output.
2
59
P30/SCK1
E
General-purpose I/O port
Also serves as the clock I/O for the UART.
This port is a hysteresis input type.
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