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| 型號： | HC05JJ6GRS |
| 英文描述： | 68HC05JJ6 and 68HC05JP6 General Release Specification |
| 中文描述： | 68HC05JJ6和68HC05JP6總發(fā)行規(guī)格 |
| 文件頁數(shù)： | 14/106頁 |
| 文件大?。?/td> | 1366K |
| 代理商： | HC05JJ6GRS |
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GENERAL RELEASE SPECIFICATION
July 16, 1999
MOTOROLA
1-4
GENERAL DESCRIPTION
For More Information On This Product,
Go to: www.freescale.com
MC68HC05J5A
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 V
DD
AND V
SS
Power is supplied to the MCU through V
and V
SS
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.
DD
and V
SS
. V
DD
is the positive supply,
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
F
Freescale Semiconductor, Inc.
n
.
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