Fastrax IT321, Техническое описание

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2007-11-19
Page 14 of 35
IT321_Tech_doc_12
cess to UART (TXA & RXA), BOOT1 and BOOT2 input signals and
VDD On/Off control.
Note that during the flash update process the serial data speed is
changed and thus the serial line connection should be a direct line to
the host without any transferring utilities that may cause failure during
speed change.
Table 4 BOOT modes
BOOT mode BOOT2
(internal
pull up)
BOOT1
(internal
pull down)
Flash (Normal mode) 0 0
Reserved 0 1
Flash programming UART A 1 1
ROM (Normal mode) (Default) 1 0
3.5 Procedure for re-programming the flash firmware
1. Connect UART (RXA and TXA signals) to PC via RS232 converter.
2. Set the module to UART boot mode: Power up the module to Flash
programming mode according to Table 4. when using Fastrax
Evaluation kit power up the kit and toggle Prog/Reset switch to
Prog position.
3. Start SiRFFlash application on PC.
4. Browse for the flash *.s file.
5. Check the Communication setting from the SiRFFlash to meet
your PC serial port.
6. Press Execute at SiRFFlash. Now the flashing starts.
7. After flashing has finished, recover normal operation by toggling
power VDD off-on and setting boot mode to Flash mode according
to Table 4.