Specification for Hybrid Card Reader
Matsushita Industrial Information Equipment Co., Ltd. Specification No.: MIS-DG60C203
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(1) S1
Card present sensor (micro-switch) is positioned at the front of card reader.
The switch is normally open, and it is grounded when the card is inserted in the
card reader.
(2) S2
The card seated sensor (micro-switch) is positioned at the rear of card reader.
The switch is normally open, and it is grounded when the card is fully inserted.
When the switch is grounded, IC contact pins of card reader touch the IC chip on
the smart card, and the card is at the specified position to read and write IC.
(3) S3
The latch sensor (leaf-switch) indicates that the latching mechanism is activated
and in a locked state. The switch is normally open, and it is grounded when the
latch mechanism is activated (=card lock status).
6.4.2 Signal related with latch / unlatch of a card
(1) LC
The latch control signal LC should be normally "L". And the latch mechanism is
actuated to lock the card when the signal goes "H" by detecting a signal from host.
The latch mechanism is on unlatched position when the signal goes "L".
The state of the latch mechanism can be determined by the state of the card-latch
sensor S3.
Note 1: If power is turned off accidentally during the card is latched and is hold inside
of the card reader, the card will be released automatically by unlatch pulse
which is generated by card reader itself. Back up power supply is required
and connected with the card reader.
Panasonic confirm the performance with 8200 µF capacitor, however, please
select right value of capacitor based on actual condition/environment.
In case wrong one is used, unsatisfactory performance may cause.
Note 2: The state of card-latch sensor S3 should be check periodically.
If the latch mechanism is on latch position while it must be on unlatched
position originally, latch mechanism must be change to unlatched position by
following order ;
1) Change LC signal from "L" to "H" and keep "H" more than 200 ms.
2) Change LC signal from "H" to "L" in order to an activate the latch
mechanism. (set the latch mechanism to unlatch position)
3) Re-check the state of card latch sensor S3 and confirm the latch
mechanism is set to unlatch position.
6.4.3 Signal related to reading of magnetic stripes
(1) / RDT2 (Read Data)
When the /RCL2 signal changes from "High" level to "Low" level :
"1" is indicated when the /RDT2 signal is at "Low" level.
"0" is indicated when the /RDT2 signal is at "High" level.
(2) / RCL2 (Read Clock)
This is used to sample the /RDT2 signal at its falling edges.
(3) /CLD
The /CLD line will be low when a magnetic card is running in the card reader.
The /CLD line will be high when the card is stopped or not present in the card
reader.