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| 型號： | MC68HC05L1FU |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數(shù)： | 14/102頁 |
| 文件大小： | 632K |
| 代理商： | MC68HC05L1FU |
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MC68HC05L1
MOTOROLA
2-1
PIN DESCRIPTION AND INPUT/OUTPUT PORTS
2
PIN DESCRIPTION AND
INPUT/OUTPUT PORTS
This section provides a description of the functional pins and I/O programming of the
MC68HC05L1/
MC68HC705L1 microcontroller.
2.1
PIN DESCRIPTIONS
PIN NAME
56-pin SDIP
PIN No.
64-pin QFP
PIN No.
DESCRIPTION
VDD, VSS
27, 28
23, 24
Power is supplied to the MCU using these two pins.VDD is power and
VSS is ground.
IRQ/VPP
18
12
In the user mode this pin is an external hardware interrupt IRQ. It is
software programmable to provide two choices of interrupt triggering
sensitivity. These options are:
1) negative edge-sensitive triggering only, or
2) both negative edge-sensitive and level sensitive triggering.
In bootstrap mode on the MC68HC705L1, this is the EPROM
programming voltage input pin.
RESET
45
43
The active low RESET input is not required for start-up, but can be
used to reset the MCU internal state and provide an orderly software
start-up procedure.
OSC1, OSC2
46, 47
44, 45
These pins provide connections to the on-chip oscillator. The
maximum crystal frequency is 4.2MHz. OSC1 may be driven by an
external oscillator if an external crystal circuit is not used.
PA0-PA7
19-26
13-16, 19-22
These eight I/O lines comprise port A. The state of any pin is software
programmable. All port A lines are congured as input during power
on or external reset.
PB0-PB7
29-36
25-30, 33, 34
These eight I/O lines comprise port B. The state of any pin is software
programmable. All port B lines are congured as input during power
on or external reset.
TPG
17
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