Gemalto M2M GmbH ELS61-USA 사용자 설명서

®

2.1 Application Interface



els61-usa_hid_v01.040a

2017-08-31

Confidential / Preliminary

Page 18 of 113

Emer-

gency 

restart

EMERG_RST

I

R

I

 

≈

 1kΩ, C

I

 

≈

 1nF

V

OH

max = VDDLP max

V

IH

min = 1.35V

V

IL

max = 0.3V at ~200µA

~~|___|~~ low impulse width > 10ms

This line must be driven 

low by an open drain or 

open collector driver con-

nected to GND.

If unused keep line open.

RTC 

backup

VDDLP

I/O V

O

norm = 1.8V ±5%

I

O

max = -25mA

V

I

max = 1.9V

V

I

min = 1.0V

I

I

typ < 1µA

It is recommended to use 

a serial resistor between 

VDDLP and a possible 

capacitor (bigger than 

1µF). 

If unused keep line open.

USB

VUSB_IN

I

V

I

min = 3V

V

I

max = 5.25V

Active and suspend current: 

I

max

 < 100µA

All electrical characteris-

tics according to USB 

Implementers' Forum, 

USB 2.0 Specification.

If unused keep lines 

open.

USB_DN

I/O Full and high speed signal characteris-

tics according USB 2.0 Specification.

USB_DP

Serial 

Interface 

ASC0

RXD0

O

V

OL

max = 0.25V at I = 1mA

V

OH

min = 1.55V at I = -1mA

V

OH

max = 1.85V

If unused keep lines 

open.

Note that some ASC0 

lines are originally avail-

able as GPIO lines. If 

configured as ASC0 

lines, the GPIO lines are 

assigned as follows:

GPIO1 --> DTR0

GPIO2 --> DCD0

GPIO3 --> DSR0

GPIO24 --> RING0

The DSR0 line is also 

shared with the SPI inter-

face‘s SPI_CLK signal.

Note that DCD0/GPIO2 

must not be driven low 

during startup

CTS0

O

DSR0

O

DCD0

O

RING0

O

TXD0

I

V

IL

max = 0.35V

V

IH

min = 1.30V 

V

IH

max = 1.85V

RTS0

I

Pull down resistor active

V

IL

max = 0.35V at > 50µA

V

IH

min = 1.30V at < 240µA

V

IH

max = 1.85V at < 240µA

DTR0

I

Pull up resistor active

V

max = 0.35V at < -200µA

V

IH

min = 1.30V at > -50µA

V

IH

max = 1.85V

Signal properties