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參數(shù)資料
| 型號： | MC68HC05J5AJDWR3 |
| 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, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 13/106頁 |
| 文件大?。?/td> | 1069K |
| 代理商： | MC68HC05J5AJDWR3 |
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GENERAL RELEASE SPECIFICATION
July 16, 1999
MOTOROLA
GENERAL DESCRIPTION
MC68HC05J5A
1-4
REV 2.1
1.4
PIN ASSIGNMENTS
Figure 1-2. Pin Assignments for 16-Pin and 20-Pin Packages
1.5
FUNCTIONAL PIN DESCRIPTION
The following paragraphs give a description of the general function of each pin
assigned in Figure 1-2.
1.5.1 VDD AND VSS
Power is supplied to the MCU through VDD and VSS. VDD is the positive supply,
and VSS is ground. The MCU operates from a single power supply.
Very fast signal transitions occur on the MCU pins. The short rise and fall times
place very high short-duration current demands on the power supply. To prevent
noise problems, special care should be taken to provide good power supply
bypassing at the MCU by using bypass capacitors with good high-frequency char-
acteristics that are positioned as close to the MCU as possible. Bypassing
requirements vary, depending on how heavily the MCU pins are loaded.
1.5.2 OSC1, OSC2/R
The OSC1 and OSC2/R pins are the connections for the on-chip oscillator. The
OSC1 and OSC2/R pins can accept the following sets of components:
OSC2/R
OSC1
RESET
PA7
PA6
PA5
PA4
PB0/TCAP
PB1
VDD
VSS
IRQ/VPP
PA0
PA1
PA2
PA3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSC2/R
OSC1
RESET
PA7
PA6
PA5
PA4
PB0/TCAP
PB1
VDD
VSS
IRQ/VPP
PA0
PA1
PA2
PA3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
20
19
18
17
PB3
PB4
PB2
PB5
IRQ/VPP: VPP is only available on EPROM parts
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