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From Address/
Command Decoder
No
PROG#
(P2.2)=0
?
Yes
Read Data
from PBUS
Read Data
from PBUS
Yes
Yes
To Address/
Command Decoder
Figure 15-8. Program Word Routine
PROGRAMMING THE NONVOLATILE MEMORY
Yes
Lock Bits
Enabled
?
No
Execute Modified
Yes
Quick-Pulse Algorithm
then Return
No
Programming
Verifies
?
Yes
Assert PVER
(P2.0 = 1)
PROG#
(P2.2) = 0
?
No
PALE#
(P2.1) = 0
?
No
No
AINC#
(P2.4) = 0
?
Yes
Increment
Address by 2
Verify
Security Key
Keys
No
Match
Forever
?
Deassert
PVER (P2.0 = 0)
No
PVER
Deassert CPVER
(P2.0) = 1
Assert PVER
?
Yes
Loop
A0194-03
15-21
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