SEC1110 datasheet(13/218 Pages) MICROCHIP

13 / 218 page

 2013 - 2016 Microchip Technology Inc.

DS00001561C-page 13

SEC1110/SEC1210

5.0

PIN DESCRIPTIONS

This section provides a detailed description of each signal. The signals are arranged in functional groups according to

their associated interface.

An N at the end of a signal name indicates that the active (asserted) state occurs when the signal is at a low voltage

level. When the N is not present, the signal is asserted when it is at a high voltage level. The terms assertion and nega-

tion are used exclusively in order to avoid confusion when working with a mixture of active low and active high signals.

The term assert, or assertion, indicates that a signal is active, independent of whether that level is represented by a high

or low voltage. The term negate, or negation, indicates that a signal is inactive.

5.1

SEC1110 and SEC1210 Pin Descriptions

TABLE 5-1:

SEC1110 AND SEC1210 PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

SMART CARD INTERFACE

SC Reset

Output

SC1_RST_N/

GPIO2

Note 5-1

SC1_RST_N, SC2_RST_N: A low pulse resets the card and

triggers an “answer to reset” (ATR) response message. This

pin should be held low when the interface is not active.

SC2_RST_N/

GPIO18

GPIO2, GPIO18: These pins may alternatively be configured

as a general purpose I/O pins.

SC Clock Output

SC1_CLK/

GPIO1

Note 5-1

SC1_CLK, SC2_CLK: The clock reference for communication

with the flash media card. This pin should be held low when

the interface is not active.

SC2_CLK/

GPIO17

GPIO1, GPIO17: These pins may alternatively be configured

as general purpose I/O pins.

SC Data I/O

SC1_IO/

GPIO0

Note 5-1

SC1_IO, SC2_IO: The bidirectional serial data pin, which

should be held low when the interface is not active.

SC2_IO/

GPIO16

GPIO0, GPIO16: These pins may alternatively be configured

as general purpose I/O pins.

SC Voltage for

Card

SC1_VCC/

SC2_VCC

The voltage supply pin, where the output of the pin can be set

to 1.8, 3.0, or 5.0 volts, depending on the type of Smart Card

detected. These pins require an external1

F capacitor.

The same voltage must be applied to power SCx_RST#,

SCx_CLK, SCx_IO, SCx_C4, and SCx_C8 pins as digital

inputs.

SC Standard or

Proprietary Use

Contact

SC1_C8

(SC1_SPU)/

Note 5-1

SC1_C8, SC1_SPU: These pins can be used for either

standard or proprietary use as an input and/or output.

GPIO4

This pin can alternatively be used as general purpose I/O pin.

SC Present

SC1_PRSNT_N/

JTAG_TMS/

TIMER0_IN/

GPIO6

SC2_PRSNT_N/

JTAG_TDI/

GPIO19

I/O8PUD

SC1_PRSNT_N, SC2_PRSNT_N: Active-low signals used to

detect the Smart Card device. These pins have an internal

pull-up which can be activated by software to detect the Smart

Card device.

JTAG_TMS, JTAG_TDI: These pins can alternatively be

configured in debug mode by software.

GPIO6, GPIO19: These pins can alternatively be used as

general purpose I/O pins, or as the Timer 0 input pin.

SC1_FCB

SC1_C4

(SC1_FCB)/

Note 5-1

SC1_C4: This pin is to attach to C4 of the Smart Card for

cards that support Function Code.

GPIO3

GPIO3: This pin may alternatively be configured as a general

purpose I/O pin.

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