M38503MXH Datasheet, PDF (62/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ID Check
This command checks the ID code. Execute the boot ID check com-
mand as explained here following.
(1) Transfer the “F516” command code with the 1st byte.
(2) Transfer addresses A0 to A7, A8 to A15 and A16 to A23 (“0016”) of
the 1st byte of the ID code with the 2nd, 3rd and 4th bytes re-
spectively.
(3) Transfer the number of data sets of the ID code with the 5th byte.
(4) The ID code is sent with the 6th byte onward, starting with the 1st
byte of the code.
SCLK
RxD
F516 D416 FF16 0016 ID size ID1
ID7
TxD
SRDY1(BUSY)
Fig. 64 Timing for the ID check
ID Code
When the flash memory is not blank, the ID code sent from the pe-
ripheral units and the ID code written in the flash memory are com-
pared to see if they match. If the codes do not match, the command
sent from the peripheral units is not accepted. An ID code contains 8
bits of data. Area is, from the 1st byte, addresses FFD416 to FFDA16.
Write a program into the flash memory, which already has the ID
code set for these addresses.
Address
FFD416
FFD516
FFD616
FFD716
FFD816
FFD916
FFDA16
FFDB16
ID1
ID2
ID3
ID4
ID5
ID6
ID7
ROM cord Protect control
Interrupt vector area
Fig. 65 ID code storage addresses
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