cx82100 Conexant Systems, Inc., cx82100 Datasheet - Page 59

• Manufacturer Part Number: cx82100
• Description: Home Network Processor Hnp
• Manufacturer: Conexant Systems, Inc.

Figure 3-3. Boot Procedure
101306C
Device Descriptor, Device
Config., endpoint config.,
string ID, Prod. string ID,
Lang. string ID, Manuf.
Begin execution of the
Read from EEPROM,
Load UDC, EPINFO,
and store in SRAM.
STRINGBUFs, with
Power-On-Reset
Continuous loop
waiting for USB
Internal ROM boot(GPIO14=1)
Read signature
Is the signature
CONFIGBUFs,
ENDPTBUFs,
bytes (first 4
SRAM data.
ROM code.
EEPROM.
bytes) of
present?
traffic.
Y
Conexant Proprietary and Confidential Information
CX82100 Home Network Processor Data Sheet
Device Descriptor, Device
Read from internal ROM,
Config., endpoint config.,
string ID, Prod. string ID,
Lang. string ID, Manuf.
and store in SRAM.
GPIO14 boot option pin
N
Flash boot(GPIO14=0)
m apped to ROM address
Begin execution of Flash
boot scenario.
swap ROM and RAM
address space. Now
Typical Flash
application firm ware
Set Run-Map bit to
Power-On-Reset
FCLK and BLCK
Copy application
flash to SDRAM.
Enable SDRAM.
Flash boot code
copies itself into
executing out of
Jum p to start of
in SDRAM and
firm ware from
frequencies.
execute.
SRAM.
SRAM.
space.
Set up
101545_009
3-5