Maxim Integrated 73S12xxF Software - Manual (Page 68)

73S12xxF Software User Guide UG_12xxF_016
68 Rev. 1.50
Application/Host
Received hex
record from
App/Host
Good record
(good CRC)?
Send 'F' to App/
Host
Address >
0x01FF
Send 'P' to App/
Host
Program Flash
with Hex record
End of File?
Yes
Jump to new app.
Start
Flash
Prog.
Yes
Start
Flash
Down
Load
Configure COM port
@ 115,200 baud,
8N1, Xon/Xoff
Open Hex File
Yes
No
No
End of file? Read Hex Record
Send Record to
LAPI
No
Prompt User to
terminate App.
LAPI Responds
= ?
Retry
exhausted
'P' 'F'
No
Yes
Yes
LAPI-*.lib
Ignore Record
No
Configure COM port
@ 115,200 baud,
8N1, Xon/Xoff
Figure 10: FLASH Download and Programming Process
Boot()
Purpose Invoke the Boot Loader function to start reprogramming of Flash.
Synopsis
void Boot ( U16 PassCode );
Parameters
PassCode: Input parameter
Specifies the 2-byte passcode.
Return Codes FALSE if the PassCode fails validation.
Once an application calls the Boot function, and the PassCode is validated, control will not be returned.
CheckPassCode ()
Purpose Validate the PassCode for Security Mode management, PassCode management and
the Boot function.
Synopsis
Bbool CheckPassCode ( U16 PassCode );
Parameters
PassCode: Input parameter
Specifies the 2-byte passcode.
Return Codes TRUE if the PassCode is validated.
FALSE if the PassCode doesn’t match with the passcode stored in the Boot Loader
code space.