參數(shù)資料
型號: MC68HC705K1P
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 52/140頁
文件大?。?/td> 1219K
代理商: MC68HC705K1P
General Description
Pin Assignments
MC68HC705K1 — Rev. 2.0
Technical Data
MOTOROLA
General Description
19
1.6 Pin Assignments
Figure 1-2 shows the MC68HC705K1 pin assignments.
Figure 1-2. Pin Assignments
1.6.1 VDD and VSS
VDD and VSS are the power supply and ground pins. The MCU operates
from a single 5-volt 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. Bypassing Layout Recommendation
RESET
OSC1
OSC2
VSS
VDD
PA7
PA6
PA5
PA4
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PB1/OSC3
PB0
IRQ/VPP
PA0
PA1
PA2
PA3
VDD
VSS
C1
MCU
C2
VDD
VSS
V+
+
C1
OSC1
OSC2
C2
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