578
CHAPTER 27
µ
PD78P078, 78P078Y
27.3.3 PROM reading procedure
PROM contents can be read onto the external data bus (D0 to D7) using the following procedure.
(1) Fix the RESET pin low, and 5 V to the V
PP
pin. Unused pins are handled as shown in, 1.5 (2) PROM
programming mode and 2.5 Pin Configuration (Top View).
(2) 5 V to the V
DD
and V
PP
pins.
(3) Input address of data to be read to pins A0 through A16.
(4) Read mode.
(5) Output data to pins D0 through D7.
The timing for steps (2) through (5) above is shown in Figure 27-7.
Figure 27-7. PROM Read Timing
Address Input
A0 to A16
CE (Input)
OE (Input)
D0 to D7
Hi-Z
Hi-Z
Data output
Summary of Contents for PD78076
Page 2: ...2 MEMO ...
Page 12: ...12 MEMO ...
Page 48: ...48 MEMO ...
Page 64: ...64 MEMO ...
Page 82: ...82 MEMO ...
Page 100: ...100 MEMO ...
Page 130: ...130 MEMO ...
Page 180: ...180 MEMO ...
Page 222: ...222 MEMO ...
Page 248: ...248 MEMO ...
Page 288: ...288 MEMO ...
Page 308: ...308 MEMO ...
Page 364: ...364 MEMO ...
Page 494: ...494 MEMO ...
Page 526: ...526 MEMO ...
Page 544: ...544 MEMO ...
Page 558: ...558 MEMO ...
Page 580: ...580 MEMO ...
Page 596: ...596 MEMO ...
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Page 626: ...626 MEMO ...