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UPD78P014 Datasheet(PDF) 22 Page - NEC

No. de pieza UPD78P014
Descripción Electrónicos  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  62 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
Logo NEC - NEC

UPD78P014 Datasheet(HTML) 22 Page - NEC

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µPD78P014
4.3
PROM Read Procedure
PROM contents can be read onto the external data bus (D0 to D7) using the following procedure.
(1)
Fix the RESET pin low. Supply +5 V to the VPP pin. Unused pins are handled as shown in “PIN CONFIGURATION
(2) PROM programming mode”.
(2)
Supply +5 V to the VDD and VPP pins.
(3)
Input address of data to be read to pins A0 through A14.
(4)
Read mode .
(5)
Output data to pins D0 through D7.
Timing for steps (2) through (5) above is shown in Figure 4-3.
Figure 4-3. PROM Read Timing
A0-A14
Address Input
CE (Input)
OE (Input)
D0-D7
Data Output
Hi-Z
Hi-Z



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