Texas Instruments TMS320 - Manual (Page 64)

TMS320E25
SPRS010B — MAY 1987 — REVISED NOVEMBER 1990
POST OFFICE BOX 1443
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HOUSTON, TEXAS 77001 64
Start
X = 0
Verify
RBIT
Device
Passed
X = 25?
Fail
No
Pass
EPROM
Protect
Setup
Program One
1-ms Pulse
X = X + 1
Protect
Verify
Setup
Device
Failed
Verify
RBIT
Protect
Verify
Setup
Program One
Pulse of 3X-ms
Duration
EPROM
Protect
Setup
Yes
Figure 12. EPROM Protect Flowchart
protect verify
Protect verify is used following the EPROM protect to verify correct programming of the RBIT (see Figure 12).
When using protect verify, Q8 outputs the state of the RBIT. When RBIT = 1, the EPROM is unprotected; when
RBIT = 0, the EPROM is protected. The EPROM protect and verify timings are shown in Figure 13.
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ION