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| 型號： | MB90P553A |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 7/58頁 |
| 文件大?。?/td> | 695K |
| 代理商： | MB90P553A |
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MB90550A/550B Series
7
I
PIN DESCRIPTION
(Continued)
Pin no.
Pin name
Circuit type
Function
QFP
LQFP
82
80
X0
A
Oscillation pin
83
81
X1
A
Oscillation pin
77
75
RST
B
Reset input pin
52
50
HST
C
Hardware standby input pin
85 to 92 83 to 90
P00 to P07
D
(CMOS)
General-purpose I/O ports.
A pull-up resistor can be added (RD07 to RD00 = 1) by using
the pull-up resistor setting register (RDR0).
D07 to D00 = 1: Disabled when the port is set for output.
AD00 to
AD07
Serve as lower data I/O/lower address output (AD00 to AD07)
pins in the external bus mode.
93 to
100
91 to 98
P10 to P17
D
(CMOS)
General-purpose I/O ports.
A pull-up resistor can be added (RD17 to RD10 = 1) by using the
pull-up resistor setting register (RDR1).
D17 to D10 = 1: Disabled when the port is set for output.
AD08 to
AD15
Serve as upper data I/O/middle address output (AD08 to AD15)
pins in the 16-bit bus-width, external bus mode.
1 to 8
99,100,
1 to 6
P20 to P27
E
(CMOS)
General-purpose I/O ports.
This function is enabled either in single-chip mode or with the
external address output control register set to “Port”.
A16 to A23
External address bus A16 to A23 output pins.
This function is enabled in an external-bus enabled mode with
the external address output register set to “Address”.
9
7
P30
E
(CMOS)
General-purpose I/O port.
This function is enabled in single-chip mode.
ALE
Address latch enable output pin.
This function is enabled in an external-bus enabled mode.
10
8
P31
E
(CMOS)
General-purpose I/O port.
This function is enabled in single-chip mode.
RD
Read strobe output pin for the data bus.
This function is enabled in an external-bus enabled mode.
12
10
P32
E
(CMOS)
General-purpose I/O port.
This function is enabled in single-chip mode.
WRL
Write strobe output pin for the lower eight bits of the data bus.
This function is enabled in an external-bus enabled mode.
13
11
P33
E
(CMOS)
General-purpose I/O port.
This function is enabled in single-chip mode.
WRH
Write strobe output pin for the upper eight bits of the data bus.
This function is enabled in an external-bus enabled mode.
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