參數(shù)資料
型號： MC68HC705CL4FU
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 1.84 MHz, MICROCONTROLLER, PQFP80
封裝： QFP-80
文件頁數(shù)： 7/101頁
文件大?。?/td> 517K
代理商： MC68HC705CL4FU
February 12, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL4
GENERAL DESCRIPTION
MOTOROLA
REV 2.0
1-3
1.4
PIN ASSIGNMENTS
The MC68HC05CL4 is available in the 80-pin QFP package. The pin assignments
for this packages are shown in Figure 1-2.
Figure 1-2. MC68HC05CL4 Pin Assignments
1.5
FUNCTIONAL PIN DESCRIPTION
The following paragraphs give a description of the general function of each pin.
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.
BP2
BP1
TCMP/RDO
21
22
24
25
26
27
28
29
30
31
33
34
35
36
23
60
59
57
56
55
54
53
52
51
50
49
48
47
46
45
58
FP40/PD3
FP39/PD2
FP37/PD0
FP36/PC7
FP35/PC6
FP34/PC5
FP33/PC4
FP32/PC3
FP31/PC2
FP30/PC1
FP29/PC0
FP28
FP27
FP26
FP25
FP38/PD1
PA0
PA1
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
FSK+
FSK–
PA2
FP1
FP2
FP4
FP5
FP6
FP7
FP9
FP10
FP11
FP12
FP13
FP14
FP15
FP16
FP3
IRQ
RESET
OSC2
VDD
VSS
TCAP/RDI
BP0
BP3
BP4/FP48
BP5/FP47
BP6/FP46
BP7/FP45
OSC1
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
3
FP8
32
80
79
77
76
75
74
72
71
70
69
68
67
66
65
78
73
RT
RD1
RD2
FP0
17
18
19
20
FP41/PD4
FP42/PD5
FP44/PD7
FP43/PD6
63
62
61
64
37
38
40
39
FP17
FP18
FP10
FP19
44
43
41
42
FP24
FP23
FP21
FP22
MC68HC05CL4
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