AT89C5122 ATMEL [ATMEL Corporation], AT89C5122 Datasheet - Page 13

• Manufacturer Part Number: AT89C5122
• Description: MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES
• Manufacturer: ATMEL [ATMEL Corporation]

Table 2. Pin Description
Pin Description
4202D–SCR–06/05
CCLK
CRST
Port
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
CC4
P1.2
CC4
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
CIO
30
29
28
27
25
24
23
22
64
12
47
62
58
57
56
52
51
50
3
2
9
6
32
23
31
3
2
5
6
4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
41
40
39
38
36
35
34
33
12
11
18
21
15
58
65
64
63
9
7
3
2
1
10
4
7
6
9
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
30
29
28
27
25
24
23
22
64
12
47
62
58
57
56
52
51
50
3
2
9
6
32
23
31
3
2
5
6
4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Internal
Supply
Power
CVCC
CVCC
CVCC
CVCC
CVCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
ESD
2KV
2KV
2KV
2KV
2KV
2KV
2KV
2KV
6KV
6KV
2KV
6KV
6KV
6KV
2KV
2KV
2KV
2KV
2KV
2KV
2KV
2KV
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
Reset
Level
Float
Float
Float
Float
Float
Float
Float
Float
0
1
0
0
0
1
1
1
1
1
1
0
1
1
CPRES
CCLK1
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
Alt
A10
A11
A12
A13
SS
A8
A9
Push-pull
Push-pull
Config
Reset
Port51
Port51
Port51
Port51
Port51
Port51
Port51
Port51
Port51
Port51
Port51
Port51
P0
P0
P0
P0
P0
P0
P0
P0
ESD tested with a 10µF on CVCC
ESD tested with a 10µF on CVCC
ESD tested with a 10µF on CVCC
ESD tested with a 10µF on CVCC
ESD tested with a 10µF on CVCC
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Conf 1
Weak & medium pull-up can be
recommended to support ICC’s
with too high internal pull-ups.
An external pull-up of 10K is
CVCC inactive at reset.
CVCC inactive at reset
CVCC inactive at reset
CVCC inactive at reset
CVCC inactive at reset
disconnected
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
KB_OUT
Conf 2
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Conf 3
WPU
WPU
WPU
WPU
WPU
WPU
Input
Input
Input
Input
Input
Input
Led
13