Application Note With Level Shifter; Spi Bus; Figure 11: Level Shifter Application Diagram For Serial Link; This Document Is The Sole And Exclusive Property Of Wavecom. Not To Be Distributed Or Divulged Without Prior Written - Wavecom Integra M2106+ Product Specification

3.6.2

Application Note with Level Shifter

A level shifter (MAX3238, for example) can be used for an application requiring V28 levels.

Figure 11: Level shifter application diagram for serial link*

This application note is valid for VCC ≥ 3.0 Volt (see MAX3238 specifications). Auto shutdown mode is not used in this example.
*
3.7

SPI Bus

The SPI bus includes a clock signal (SPI_CLK), an I/O signal (SPI_IO), and an enable signal (SPI_EN)
complying with the SPI bus standard.
Signal Pin #
SPI_CLK
SPI_IO
SPI_EN*
* Multiplexed with GPO3.
©Confidential

This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without prior written

agreement.

WA_DEV_M2106+_PTS_003-001
W ireles s
CP U ®
D CE
V CC
VCC
Pin description
I/O Reset State
44 O Pull up
43 I/O Pull up
42 O Output high
Lev el Sh if t er
T er m in al
ERRO R
O N
M A X3 2 3 8
I/O type
1X
CMOS / 1X
1X
Integra M2106+
Erreur ! Style non défini.
D T E
VCC
VCC
VCC
Description
SPI Serial Clock
SPI Data
SPI Enable
Page: 32 / 77
April, 2007