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© 2011, Microchip Technology Incorporated, Printed in the U.S.A. All Rights Reserved. 03/11

DS51958A

  02/18/11

The SC PICtail™ Daughter Board is an expansion board used for evaluating, reading and writing 
data on Smart cards and SIM cards. 

• Supports a wide range of Smart cards and SIM cards
• Operates on a wide range of voltages from 3.3V-5.0V DC
• Includes PICtail Daughter Board and PICtail Plus Board connection interfaces

•

Compatible with boards like Explorer 16 Development Board and PICDEM™ FS USB Demo 
Board

To get started, a compatible PICDEM™ demonstration board is required. In general, a board is
compatible if it has a PICtail Daughter Board interface expansion port or a PICtail Plus Board
interface expansion port. When connecting the SC PICtail Daughter Board to a board with the
PICtail Plus connector, like the Explorer 16 Development Board, the connector should be inserted
in the first slot of the demonstration board (aligned with Pin #1) to communicate using the UART1
module.

Each of the Smart card signals have an outbound pin on the SC PICtail Daughter Board to check
the signal status during the application development life cycle. Apart from this, if the user wants
to connect the Smart card signals to different port pins of the microcontroller, then the signal wires
can be directly connected from the microcontroller to the appropriate outbound pins on the SC
PICtail Daughter Board.

The SC PICtail Daughter Board consists of two slots; one to insert the Smart card and the other to
insert the SIM card. The SIM card and Smart card slots are connected in pin-to-pin parallel format.
Therefore, for proper communication between the interfacing device and the card, either the Smart
card or the SIM card has to be inserted in the SC PICtail board but not both.

SMART_V

CC

O

RB9

(Pin 44)

RB0,RC0

(Pin 27, Pin 20)

Power supply to the Smart 
card/SIM card

SMART_RST

O

RE8

(Pin 18)

RB4,RC1

(Pin 19, Pin 22)

Reset signal to the Smart 
card/SIM card

SMART_CLK

O

RB15,RD1

(Pin 84, Pin 94)

RB2,RC2

(Pin 23, Pin 24)

Clock input to the Smart 
card/SIM card

SMART_CARD_DET

I

RB0

(Pin 11)

RB3 

(Pin 21)

Smart card insertion detect 
signal

SIM_CARD_DET

I

RB1

(Pin 12)

RB1(Pin 25)

SIM card insertion detect 
signal

SMART_I/O

I/O UART1_RX,UART1_TX

(Pin 2, Pin 4)

RC6,RC7

(Pin 9, Pin 11)

Serial input and output data 
line (half-duplex)

The board interfacing the SC PICtail Daughter Board should be able to provide the
sufficient current and voltages as per the electrical specifications of the Smart card
chip inserted in the slot. Therefore, the microcontroller interfacing the SC PICtail
Daughter Board has to be chosen depending upon the specific application and the
operating voltage requirement of the Smart card. If the microcontroller cannot sup-
port sufficient current and voltage required for the Smart card, then an external hard-
ware circuitry has to be used to provide the current and voltage. 

In the SC PICtail Daughter Board, only one jumper location is available. This jumper is useful only
when the SC PICtail Daughter Board is used along with the Explorer 16 Board.

The latest Smart card software library, CCID demo, Smart card communication demo, Help files
and Getting Started document are released as part of the “Microchip Applications Libraries” which
can be downloaded from 

http://www.microchip.com/mal.

• ISO 7816-3 specifications available by license

• www.microchip.com

JP1

Pin (SRC1-CLK)

Clock to the Smart card/SIM card is fed from RD1

Pin (SRC2-CLK)

Clock to the Smart card/SIM card is fed from RB15