SI2493-C-FT Silicon Laboratories Inc, SI2493-C-FT Datasheet - Page 62

• Manufacturer Part Number: SI2493-C-FT
• Description: 56 KBPS, V.92 ISOMODEM SYSTEM-SIDE - LEAD-FREE TSSOP 0 TO 7
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2493-C-FT

• Mfg Application Notes: SI2493/57/34/15/04, Appl Note AN93
• Data Format: V.21, V.22, V.23, V.29, V.32, V.34, V.90, V.92, Bell 103, Bell 212A
• Baud Rates: 56k
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN93
3.3.3. Detailed EEPROM Examples
EEPROM Data is stored and read in hex ascii format in
eight address blocks beginning at a specified hex address.
For
command writes the hex values y0…y7 at the hex
addresses from 0000 to 0007, respectively. The AT:E0000
command reads the hex values y0…y7 from the hex
addresses 0000 to 0007, respectively.
3.3.4. Boot Commands (custom defaults)
Commands to be executed upon boot-up are stored
between the heading “BOOT” and the first <CR><CR>
delimiter. The boot command has the following format:
BOOT<CR>
<commands><CR>
<commands><CR>
<CR>
The commands end with a <CR>, which, in combination
with the final<CR>, provides the <CR><CR> delimiter.
Boot commands must be the first entry in the EEPROM
and are used to set the modem up with custom defaults,
such as settings for specific countries, auto answer, or
other special settings upon power-up or after a
hardware or software reset. This saves the host
processor from reloading special configuration strings at
power up or after a reset and allows the modem to be
customized
substituting preprogrammed EEPROMs. If the BOOT
command is the final entry in the EEPROM, it must end
with
62
example,
an
additional
by
the
EEPROM Data Format
EECS
EESD
programming
AT:M0000,y0,y1,y2,y3,y4,y5,y6,y7
ECSS
<CR>
EOSU
EISU
MSB
8-bit instruction
EDH
EIH
Figure 14. EEPROM Serial I/O Timing
the
to
ECLK
EOH
EEPROM
provide
16-bit address
the
Rev. 0.9
or
<CR><CR><CR> delimiter indicating the end of the
EEPROM.
3.3.5. AT Command Macros (customized AT com-
Macros allow the creation of single custom AT
commands that execute combinations of default AT
commands including special register configurations. AT
command macros have the following format:
<command name><CR>
<commands><CR>
<commands><CR>
<CR>
Each AT Command Macro ends with a <CR><CR>. The
final entry in the EEPROM ends with an additional
<CR> to provide the <CR><CR><CR> delimiter
indicating the end of the EEPROM. AT command
macros can have a name consisting of any string of
characters but must be the only command on a line.
3.3.6. Firmware Upgrades
Firmware upgrades (“patches”) are typically executed
upon boot-up and stored between the heading, “BOOT”,
and the first <CR><CR> delimiter. A firmware upgrade
has the format: BOOT<firmware upgrade><CR>. The
firmware upgrade ends with a <CR>, which, in
combination
<CR><CR> delimiter. Firmware upgrades can also be
stored as an AT command macro if there are cases
when using the firmware upgrade is optional.
mands)
with
8-bit data
LSB
the
ECSH
EOZ
final<CR>,
ECSW
provides
the