DSP56600FMSLASHAD datasheet(36/76 Pages) NXP

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Preliminary

1-30

DSP56652 Technical Data Sheet

MOTOROLA

Pin and Signal Descriptions

DSP56652 Signal Description

Smart Card Port

After rest, the default state of all Smart Card port pins is GPI. For Smart Card port

signals equipped with resistors, all pull-ups and pull-downs are automatically

disconnected when the pin is an output.

Table 1-17

Smart Card Port Signals

Signal Name

Signal

Type

State

during

Reset

Signal Description

SIMCLK

Output

Input or

Output

Input

SIM clockÑ

This signal is an output clock from the Smart Card port

to the Smart Card.

This signal is a GPIO signal when the Smart Card port is not being

used.

SENSE

Input

Input or

Output

Input

SIM senseÑ

This signal is a Schmitt trigger input that signals when

a Smart Card is inserted or removed.

This signal is a GPIO signal when the Smart Card port is not being

used. The signal has an on-chip 100 k

W pull-down resistor.

SIMDATA

Input/

Output

Input or

Output

Input

SIM dataÑ

This bidirectional signal is used to transmit data to and

receive data from the Smart Card. In the output state, the signal is

open drain.

This signal is a GPIO signal when the Smart Card port is not being

used. The signal has an on-chip 47 k

W pull-up resistor.

SIMRESET

Output

Input or

Output

Input

SIM ResetÑ

This signal is an output reset signal from the Smart

Card port to the Smart Card. The Smart Card port can activate the

reset of an attached Smart Card by driving SIMRESET low.

This signal is a GPIO signal when the Smart Card port is not being

used.

PWR_EN

Output

Input or

Output

Input

SIM power enableÑ

This active high output enables the external

device that supplies VCC to the Smart Card. If this pin is driven

high, the external device supplies power to the Smart Card. Driving

the signal low cuts off power to card. This permits effective power

management and power sequencing for Smart Card enable/disable.

This signal is a GPIO signal when the Smart Card port is not being

used. This signal has an on-chip 100 k

W pull-down resistor.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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