CS493002-CL Cirrus Logic, CS493002-CL Datasheet - Page 60

• Manufacturer Part Number: CS493002-CL
• Description: Multi-Standard Audio Decoder Family
• Manufacturer: Cirrus Logic

60
WRITE_*(DOWNLOAD_
RESET(LOW)
WRITE_*(HW_CONFIG_MSG,
WRITE_*(SW_CONFIG_MSG,
BOOT, MSG_SIZE)
WRITE_*(GFABTX.LD FILE,
INTREQ LOW?
AUTOBOOT COMPLETE
WAIT 135 MS, 100 MS,
DOWNLOAD FILE SIZE)
WRITE_*(KICKSTART,
CORRECT VALUE?
READ_*(VARIABLE)
OR 70 MS
(NOTE 4)
(NOTE 6)
(NOTE 6)
(NOTE 6)
Y
HW_MSG_SIZE)
SW_MSG_SIZE)
(NOTE 1)
MSG_SIZE)
(NOTE 5)
Y
N
Figure 38. Fast Autoboot Sequence Using GFABT Codes
N
RESET(HIGH)
WAIT 5 MS
(NOTE 2)
READ_*(MESSAGE)
BOOTSTART?
Notes: 1. RESET must be held LOWT
MESSAGE ==
Y
2. It should be noted that mode pins are used
3. Time-out values reflect worst case response
4. Hardware configuration messages are
5. INTREQ should be ignored during this
6. The READ_* and WRITE_* functions are
to configure the CS493XX serial
communication mode. These mode pins are
latched internally on the rising edge of reset.
The pins can be set dynamically by a
microprocessor or can be statically pulled
HIGH or LOW. If these pins are driven
dynamically, setup and hold times must be
satisfied as stated in the CS493XX Data
Sheet . More information about the function
of the mode pins can be found in the
CS493XX Data Sheet and in
“Control” on page
time for the CS493XX. The values shown
may be used for the host’s time-out control
loop.
covered in
Application configuration messages are
covered in each application code user’s
manual.
period. Depending on which GFABT code is
used, wait times can vary from 135 ms to 70
ms. All actual Autoboot times should be
verified by the designer.
placeholders for the READ_I2C/READ_SPI
and WRITE_I2C/WRITE_SPI functions
defined in
Communication” on page
WAIT
N
500 µs
CS49300 Family DSP
Section 6.1, “Serial
Section 6, “Control” on page
EXIT(ERROR)
TIMEOUT AFTER
32.
20MS
(NOTE 3)
33.
rstl
Section 6,
.
DS339PP4
32.