Freescale Semiconductor, Inc.
D
P
P
P
A
A
A
A
A
V
N
N
P
P
P
D
D
P
P
G
C
4
8
7
7
7
7
7
3
2
1
0
9
8
7
6
5
3
2
1
4
NC
NC
1
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
NC
2
PG1
PB6/ADDR14
PB5/ADDR13
PB4/ADDR12
PB3/ADDR11
PB2/ADDR10
PB1/ADDR9
PB0/ADDR8
PF7/ADDR7
PF6/ADDR6
PF5/ADDR5
PF4/ADDR4
PF3/ADDR3
PF2/ADDR2
PF1/ADDR1
PF0/ADDR0
PE0/AN0
3
PG2
4
PG3
5
PG4/CSIO2
PG5/CSIO1
PG6/CSGEN
PG7/CSPROG
IRQ
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
XIRQ
MC68HC11F1
RESET
PC7/DATA7
PC6/DATA6
PC5/DATA5
PC4/DATA4
PC3/DATA3
PC2/DATA2
PC1/DATA1
NC
PE4/AN4
NC
NC
Figure 2-2 Pin Assignments for MC68HC11F1 80-Pin QFP
2.1 V
V
DD and SS
Power is supplied to the MCU through V
and V . V
is the power supply, and
DD
SS DD
V
SS
is ground. The MCU operates from a single 5-volt (nominal) power supply. Very
fast signal transitions occur on the MCU pins. The short rise and fall times place high,
short duration current demands on the power supply. To prevent noise problems, pro-
vide good power-supply bypassing at the MCU. Also, use bypass capacitors that have
good high-frequency characteristics and situate them as close to the MCU as possible.
Bypass requirements vary, depending on how heavily the MCU pins are loaded.
PIN DESCRIPTIONS
MC68HC11F1
2-2
TECHNICAL DATA
For More Information On This Product,
Go to: www.freescale.com
FREESCALE [ Freescale ]
