Datasheet
General Description
MC68HC812A4 Data Sheet, Rev. 7
20 Freescale Semiconductor
1.5 Signal Descriptions
NOTE
A line over a signal name indicates an active low signal. For example,
RESET is active high and RESET
is active low.
The MC68HC812A4 is available in a 112-lead low-profile quad flat pack (LQFP). The pin assignments are
shown in Figure 1-3. Most pins perform two or more functions, as described in Table 1-2. Individual ports
are cross referenced in Table 1-3 and Table 1-4.
Figure 1-3. Pin Assignments
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
V
SSX
V
DDX
KWJ0/PJ0
KWJ1/PJ1
KWJ2/PJ2
KWJ3/PJ3
KWJ4/PJ4
KWJ5/PJ5
KWJ6/PJ6
KWJ7/PJ7
ADDR16/PG0
ADDR17/PG1
ADDR18/PG2
V
DD
V
SS
ADDR19/PG3
ADDR20/PG4
ADDR21/PG5
BKGD / TAGHI
DATA0/KWD0/PD0
DATA1/KWD1/PD1
DATA2/KWD2/PD2
DATA3/KWD3/PD3
DATA4/KWD4/PD4
DATA5/KWD5/PD5
DATA6/KWD6/PD6
DATA7/KWD7/PD7
DATA8/PC0
MC68HC812A4
112-LEAD LQFP
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
DATA9/PC1
DATA10/PC2
DATA11/PC3
DATA12/PC4
DATA13/PC5
DATA14/PC6
DATA15/PC7
XIRQ
/PE0
IRQ
/V
PP
/PE1
R/W/
PE2
LSTRB
/TAGLO/PE3
RESET
V
SSX
V
DDX
V
DDPLL
XFC
V
SSPLL
EXTAL
XTAL
ECLK/PE4
MODA/IPIPE0/PE5
MODB/IPIPE1/PE6
ARST/PE7
ADDR0/PB0
ADDR1/PB1
ADDR2/PB2
ADDR3/PB3
ADDR4/PB4
PH7/KWH7
PH6/KWH6
PH5/KWH5
PH4/KWH4
V
SSX
V
DDX
PH3/KWH3
PH2/KWH2
PH1/KWH1
PH0/KWH0
PF6/CSP1
PF5/CSP0
PF4/CSD
PF3/CS3
PF2/CS2
PF1/CS1
PF0/CS0
PA7/ADDR15
PA6/ADDR14
PA5/ADDR13
PA4/ADDR12
PA3/ADDR11
PA2/ADDR10
PA1/ADDR9
PA0/ADDR8
PB7/ADDR7
PB6/ADDR6
PB5/ADDR5
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
PT7/IOC7/PAI
PT6/IOC6
PT5/IOC5
PT4/IOC4
PT3/IOC3
PT2/IOC2
PT1/IOC1
PT0/IOC0
PS7/SS
PS6/SCK
PS5/SDO/MOSI
PS4/SDI/MISO
PS3/TxD1
PS2/RxD1
PS1/TxD0
PS0/RxD0
V
SSA
V
DDA
PAD7/AN7/V
STBY
PAD6/AN6
PAD5/AN5
PAD4/AN4
PAD3/AN3
PAD2/AN2
PAD1/AN1
PAD0/AN0
V
RL
V
RH
112
111
110
109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85