TMS27C128 131 072-BIT UV ERASABLE PROGRAMMABLE READ-ONLY MEMORY

TMS27PC128 131 072-BIT PROGRAMMABLE READ-ONLY MEMORY

SMLS128E–OCTOBER 1984–REVISED JANUARY 1993

POST OFFICE BOX 1443

77251–1443

6

Start

Address = First Location

VCC = 6.5 V ± 0.25 V, VPP = 13 V ± 0.25 V

Last

Address?

Address = First Location

X = 0

VCC = VPP = 5 V ± 0.5 V

Compare

All Bytes

To Original

Data

Device Passed

Increment Address

Increment

Address

Verify

One Byte

Program One Pulse = tw = 100 µs

X = 10?

X = X + 1

Last

Address?

Device Failed

Pass

No

Yes

Yes

No

Fail

Fail

Pass

No

Program

Mode

Interactive

Mode

Final

Verification

Yes

Program One Pulse = tw = 100 µs

Figure 1. SNAP! Pulse Programming Flowchart