7733 datasheet(514/940 Pages) RENESAS

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BUILT-IN PROM VERSION

7733 Group User’s Manual

19-8

19.1.3 Programming algorithm to built-in PROM

Set Vcc = 6 V, VPP = 12.5 V, and address to 0100016. (Refer to Table 19.1.3.)

After applying a programming pulse of 0.2 ms, check whether data can be read or not.

If the data cannot be read, apply a programming pulse of 0.2 ms again.

Repeat the procedure, which consists of applying a programming pulse of 0.2 ms and read check, until

the data can be read. Additionally, record the number of pulses applied (

X ) before the data was read.

Apply X pulses (0.2 ! X ms) (described in ) as additional programming pulses.

When this procedure ( to ) is complete, increment the address and repeat the above procedure until

the last address is reached.

After programming to the last address, read data when Vcc = VPP = 5 V (or Vcc = VPP = 5.5 V).

Figure 19.1.3 shows the programming algorithm flow chart.

19.1 EPROM mode

Fig. 19.1.3 Programming algorithm flow chart

VERIFY

ALL BYTE

START

ADDR = FIRST LOCATION

X = 0

VCC = VPP = *5.0 V

DEVICE

FAILED

DEVICE PASSED

VCC = 6.0 V

VPP = 12.5 V

X = X + 1

X= 25?

VERIFY BYTE

INCREMENT ADDR

VERIFY

BYTE

DEVICE

FAILED

LAST ADDR?

FAIL

YES

PASS

YES

FAIL

PASS

FAIL

PROGRAM ONE PULSE OF 0.2 ms

PROGRAM PULSE

OF 0.2 x ms DURATION

: 4.5 V

≤ VCC = VPP ≤ 5.5 V

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