Cirrus Logic CS485xx - Manual (Page 22)

Slave Boot Procedures
CS485xxr Hardware User’s Manual
DS734UM7 Copyright 2009 Cirrus Logic, Inc. 2-4
Figure 2-2. Slave Boot Sequence
MSG
==BOOT_START
RESET (HIGH)
WAIT 50 μ S
WRITE_* (SLAVE_BOOT)
READ_* (MSG)
EXIT(ERROR)
N
Y
MSG==
BOOT_SUCCESS
EXIT (ERROR)
N
Y
READ_* (MSG)
MSG ==APP_START
WRITE_* (SOFT_RESET)
READ_* (MSG)
EXIT (ERROR)
N
Y
MORE .ULD FILES?
Y
N
DONE
SEND HARDWARE
CONFIGURATIONS
SEND FIRMWARE
CONFIGURATIONS
WRITE_* (KICKSTART)
START
RESET (LOW)
SET HS[3:0] PINS FOR
OPERATIONAL MODE
* is replaced with SPI,
I2C, etc. depending on
the communication
protocol used.
SEND .ULD FILE