www.agelectronica.com www.agelectronica.com
www.agelectronica.com www.agelectronica.com
Enfora Enabler IIIG M2M
Modem Integration Guide
6.6.9. MCSI – Multi-Channel Serial Interface (Pins 12, 14, 16, 18)
This port is only available in Master mode and to be used for PCM digital audio. Below are the settings
for configuring it operation and the interface specification:
Digital Audio Configuration
The default settings for the digital audio are:
Mode = Master
MCSI_CLK = 520KHz
Word Size = 16 Bits
Sync Pulse = 8KHz
Frame mode = burst
Clock edge Sync = rising edge
Configuring the MCSI for Digital Audio
The following two commands are required to set the unit up in digital audio mode:
AT$voicepth=2
This configures the EIII module to use digital audio instead of analog audio.
at$ioblks=0,1
This configures the I/O pins of the module to be used as the secondary function which is the MCSI port.
It automatically configures the direction of the pins.
Do not alter the settings for these 4 pins manually (direction, pull up or alternate configuration) as this will
stop the MCSI port working for digital audio.
Data Format
The 16 bit word is sent MSB first. Data received is also MSB first. No other data manipulation is done
within the module.
Pin Name
Pin Number
Signal Direction
Description
MCSI_RX
12
I
Serial Data Input
MCSI_TX
18
O
Serial Data Output
MCSI_CLK
14
IO
Serial Clock I/O
MCSI_FSYNC
16
IO
Frame Synchronization I/O
GSM0308IG002
48
Version 1.05 – 11/13/08