5/4/98

AmC0XXCFLKA

21

EMBEDDED ALGORITHMS

D5 = 1?

18723C-10

Note: D7 is checked even if D5 = 1 because D7 may have changed simultaneously with D5 or immediately after D5.

Figure 9.

Byte-Wide Software Polling for Programming Subroutine

VA = Byte Address for Programming

D5 = 1

No = Program time not exceeded limit

Yes = Program time exceed limit, device failed

EF = Error Flag

Start

Subroutine

No

Yes

Yes

Yes

No

D7 = Data?

No

D7 = Data

Subroutine

Return

Recommend 16

µs

time out from previous

data polling

Device failed

to program

EF = 1

Device Passed

Read Byte

(D0–D7)

Addr = VA

Read Byte

(D0–D7)

Addr = VA