SEC1210 datasheet(14/218 Pages) MICROCHIP

14 / 218 page

SEC1110/SEC1210

DS00001561C-page 14

 2013 - 2016 Microchip Technology Inc.

SC Active

Indicator

SC_LED_ACT_N/

I/O8PUD

The driver for the active LED.

JTAG_TDO/

This pin can alternatively be configured in debug mode by

software.

TIMER2_T2EX/

GPIO5

This pin may alternatively be used as general purpose I/O pin,

or as the Timer 2 “t2ex” input pin.

USB INTERFACE

USB Bus Data

USB_DM,

USB_DP

I/O-U

These pins connect to the upstream USB bus data signals.

SPI1/UART INTERFACE (QFN24)

SPI1 Chip

Enable

SPI1_CE_N/

I/O8PUD

The active-low chip-enable output (Master mode).

If the SPI1 interface is disabled, this pin must be driven high

in idle state by software.

RTS/

This pin can alternatively function as the UART RTS signal,

when UART is used instead of SPI1.

GPIO11

This pin may also be used as a general purpose I/O pin.

SPI1 Clock

SPI1_CLK/

I/O8PUD

The SPI1 clock output (Master mode).

CTS/

This pin can alternatively function as the UART CTS signal,

when UART is used instead of SPI1.

GPIO10

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

pin.

SPI1 Data In

SPI_MISO/

I/O8PUD

The Master data in to the controller.

This pin must have a weak internal pull-down applied at all

times to prevent floating.

RXD/

This pin alternatively function as the UART RXD input signal,

when UART is used instead of SPI1.

GPIO8

This pin can alternatively be configured as a general purpose

I/O pin.

SPI1 Data Out

SPI_MOSI/

I/O8PUD

This is the Master data output from the controller.

This pin must have a weak internal pull-down applied when

used as input to prevent floating.

TXD/

This pin can alternatively function as the UART TXD output

signal, when UART is used instead of SPI1.

GPIO9

GPIO9: This pin can alternatively be used as a general

purpose I/O pin.

MISC

TEST

I/O8PUD

This signal is used for testing the chip. If the test function is

not used, this pin must be tied low externally.

RESET input

RESET_N

This active low signal is used by the system to reset the chip

and enter STOP mode. The active low pulse should be at

least 1

s wide. This pin is an analog input signal with Vil=100

mV.

JTAG Clock

JTAG_CLK

I/O8PUD

This input pad is used for JTAG debugging and has a weak

pull down. It can be left floating or grounded when not used.

If the JTAG is connected, this signal will be detected high, and

the software disables the pull-up after reset.

GPIO 28

GPIO28

I/O8PUD

General Purpose I/O pin.

GPIO 29

GPIO29

I/O8PUD

General Purpose I/O pin.

GPIO 30

GPIO30

I/O8PUD

General Purpose I/O pin.

TABLE 5-1:

SEC1110 AND SEC1210 PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

SEC1210 Datasheet(PDF) 14 Page - Microchip Technology

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