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UPD78P014 bảng dữ liệu(PDF) 21 Page - Renesas Technology Corp

tên linh kiện UPD78P014
Giải thích chi tiết về linh kiện  MOS INTEGRATED CIRCUIT
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µPD78P014
4.
PROM PROGRAMMING
The
µPD78P014 incorporates a 32K-byte PROM as program memory. When programming the µPD78P014, the
PROM programming mode is set by means of the VPP and RESET pins. For the connection of unused pins, see “PIN
CONFIGURATION (2) PROM programming mode”.
4.1
Operating Modes
When +5 V or +12.5 V is applied to the VPP pin and a low-level signal is applied to the RESET pin, the
µPD78P014
enters the programming mode. This is one of the operating modes shown in Table 4-1 below according to the setting
of the CE and OE pins.
Also, the PROM contents can be read by setting the read mode.
Data input
Data output
High-impedance
Data output
High-impedance
High-impedance
Operating Mode
H
L
H
L
H
L/H
L
H
H
L
L
H
Program write
Program verify
Program inhibit
Read
Output disable
Standby
Pins
Table 4-1. PROM Programming Operating Modes
RESET
VPP
VDD
D0 to D7
CE
OE
+6 V
+12.5 V
+5 V
+5 V
L



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