參數(shù)資料
型號: MC68HSC05J1A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 21/128頁
文件大?。?/td> 1620K
代理商: MC68HSC05J1A
General Description
Pin Assignments
MC68HC05J1A — Rev. 3.0
Technical Data
MOTOROLA
General Description
21
1.6 Pin Assignments
Figure 1-2
shows the MC68HC05J1A pin assignments.
Figure 1-2. Pin Assignments
1.6.1 V
DD
and V
SS
V
DD
and V
SS
are the power supply and ground pins. The MCU operates
from a single 5-V power supply.
Very fast signal transitions occur on the MCU pins, placing high
short-duration current demands on the power supply. To prevent noise
problems, take special care to provide good power supply bypassing at
the MCU. Place bypass capacitors as close to the MCU as possible, as
Figure 1-3
shows. C2 is an optional bulk current bypass capacitor for
use in applications that require the port pins to source high current
levels.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OSC1
OSC2
PB5
PB4
PB3
PB2
PB1
PB0
V
DD
V
SS
RESET
IRQ
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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