at83c23ok ATMEL Corporation, at83c23ok Datasheet - Page 4

• Manufacturer Part Number: at83c23ok
• Description: Cardman Smart@link
• Manufacturer: ATMEL Corporation

Pin Description
Table 1. Pin Description
4307CS–SCR–03/07
CPRES
CCLK
CRST
Port
CC8
CC4
P1.6
P1.7
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
SDA
SCL
CIO
32
23
31
22
24
20
19
18
21
17
13
3
2
5
6
4
32
23
31
22
24
20
19
18
21
17
13
3
2
5
6
4
Internal
Supply
Power
CVCC
CVCC
CVCC
CVCC
CVCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
ESD
6KV
6KV
2KV
6KV
6KV
6KV
2KV
2KV
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
O
O
Reset
Level
0
1
0
0
0
1
1
1
1
1
1
1
1
1
1
0
Card interface-I/O pin
CVcc inactive at reset . ESD tested with 10µF on CVcc. An external pull-up of
4.7K
Card interface-C8 pin
CVcc inactive at reset. ESD tested with 10µF on CVcc.
Card Presence signal
If P3.4 pin is connected to GND, the card inserted information generates a high
level on CPRES pin.
Else, a low level on this pin indicates that a card is inserted.
Card interface-C4 pin
CVcc inactive at reset. ESD tested with 10µF on CVcc.
Card interface-CLK pin
CVcc inactive at reset. ESD tested with 10µF on CVcc.
Card interface-RST pin
CVcc inactive at reset. ESD tested with 10µF on CVcc.
For Serial reader: Connect this to GND.
For USB reader: Leave this pin unconnected.
Leave this pin unonnected
For Serial reader: RxD: Connect this pin to the host TxD signal.
For USB reader: Connect this pin to GND.
For Serial reader: TxD: Connect this pin to the host RxD signal.
For USB reader: Leave this pin unconnected.
For Serial reader: INT0: Connect this pin to host RTS signal.
For USB reader: Connect this pin to GND.
For Serial reader: Leave this pin unconnected.
For USB reader: Connect this pin to GND.
Eject Signal
To support the eject of the smart card under control of the application. Please refer
to Design-In Manual for additionnal information.
This pin indicates also the polarity of Card Insertion Signal.
For Serial reader: Connect this to GND.
For USB reader: Leave this pin unconnected.
TWI Expansion (I²C compliant)
May be used for memory extension, parallel port expanders and more.
Please refer to the Design-IN Manual.
Ω
is recommended to support ICC’s with too high internal pull-ups.
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