Freescale Semiconductor, Inc.
Pin Descriptions
Freescale Semiconductor, Inc...
PW1/PH0
PW2/PH1
PW3/PH2
PW4/PH3
RXD2/PH4
TXD2/PH5
RXD3/PH6
TXD3/PH7
MODB/VSTBY
XIRQ
VDD
VDDL
VSSX
VSS
R/W/PG7
PG6
PG5
PG4
PG3
PG2
PG1
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
PD2/MISO
PD1/TXD1
PD0/RXD1
MODA/LIR
RESET
XFC
VDDSYN
EXTAL
XTAL
E
VDDR
VSSX
PC7/D7
PC6/D6
PC5/D5
PC4/D4
PC3/D3
PC2/D2
PC1/D1
PC0/D0
IRQ
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PG0
VDD AD
AD7/PE7
AD6/PE6
AD5/PE5
AD4/PE4
AD3/PE3
AD2/PE2
AD1/PE1
AD0/PE0
VRL
VRH
VSS AD
A7/PF7
A6/PF6
A5/PF5
A4/PF4
A3/PF3
A2/PF2
A1/PF1
A0/PF0
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
Figure 2-1. 84-pin PLCC/CERQUAD pinout
2.3 VDD and VSS
Power is supplied to the microcontroller via these pins. VDD is the
positive supply and VSS is ground. The MCU operates from a single 5V
(nominal) power supply.
It is in the nature of CMOS designs that very fast signal transitions occur
on the MCU pins. These short rise and fall times place very high short-
duration current demands on the power supply. To prevent noise
problems, special care must be taken to provide good power supply
bypassing at the MCU. Bypass capacitors should have good high-
Technical Data
Pin Descriptions
For More Information On This Product,
Go to: www.freescale.com
11
10
9
8
7
6
5
4
3
2
PB0/A8
PB1/A9
PB2/A10
PB3/A11
PB4/A12
PB5/A13
PB6/A14
PB7/A15
VSS
VDD
PA0/IC3
PA1/IC2
PA2/IC1
PA3/OC1/OC5/IC4
PA4/OC1/OC4
PA5/OC1/OC3
PA6/OC1/OC2
PA7/OC1/PAI
PD5/SS
PD4/SCK
PD3/MOSI
MC68HC11P2 — Rev 1.0
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
