Fujitsu FR60 Hardware Manual page 525

CHAPTER 19 PROGRAM LOADER MODE (SUPPORTED ONLY BY THE MB91302A (IPL INTEGRATED MODEL))
❍ Subroutine "DOWN LOAD" in Asynchronous mode
1 - byte transmission
(Response to normal command reception)
Download to internal RAM
1- byte data reception (Checksum data)
DOWN LOAD
1 - byte transmission ( 01
Receive Data ?
YES
1 - byte data reception
Increment the received data storage address
Count the number of reception times
Number of reception times =
Number of download bytes ?
YES
Receive Data ?
YES
1 - byte data reception ( Checksum data ) : α
The lower eight bits are fetched from
items added together. :
? (Checksum)
YES
EXIT
)
H
NO
NO
NO
all received data
NO
Checksum error
505