CAT28F512
Figure 7. Programming Algorithm (1)
START
PROGRAMMING
APPLY VPPH
INITIALIZE
ADDRESS
PLSCNT = 0
WRITE SETUP
PROG. COMMAND
WRITE PROG. CMD
ADDR AND DATA
TIME OUT 10 μ s
WRITE PROGRAM
VERIFY COMMAND
TIME OUT 6 μ s
READ DATA
FROM DEVICE
BUS
OPERATION
STANDBY
1ST WRITE
CYCLE
2ND WRITE
CYCLE
1ST WRITE
CYCLE
READ
COMMAND
WRITE
SETUP
PROGRAM
PROGRAM
VERIFY
COMMENTS
VPP RAMPS TO VPPH
(OR VPP HARDWIRED)
INITIALIZE ADDRESS
INITIALIZE PULSE COUNT
PLSCNT = PULSE COUNT
DATA = 40H
VALID ADDRESS AND DATA
WAIT
DATA = C0H
WAIT
READ BYTE TO VERIFY
PROGRAMMING
NO
VERIFY
DATA ?
NO
INC
PLSCNT
= 25 ?
STANDBY
COMPARE DATA OUTPUT
TO DATA EXPECTED
YES
YES
INCREMENT
ADDRESS
NO
LAST
ADDRESS?
YES
WRITE READ
COMMAND
1ST WRITE
CYCLE
READ
DATA = 00H
SETS THE REGISTER FOR
READ OPERATION
APPLY VPPL
PROGRAMMING
COMPLETED
APPLY VPPL
PROGRAM
ERROR
STANDBY
VPP RAMPS TO VPPL
(OR VPP HARDWIRED)
Note:
(1) The algorithm MUST BE FOLLOWED to ensure proper and reliable operation of the device.
Doc. No. MD-1084, Rev. K
12
? 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
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