UPD78P4038Y 查看數據表（PDF） - NEC => Renesas Technology

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UPD78P4038Y

16/8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD78P4038Y

4.2.2 Pin functions

(1) VPP (Programming power supply): Input

Input pin for setting the µPD78P4038Y to the PROM programming mode. When the input voltage on this pin

is +5 V or more and when RESET input goes low, the µPD78P4038Y enters the PROM programming mode.

When CE is made low for VPP = +12.5 V and OE = high, program data on D0 to D7 can be written into the internal

PROM cell selected by A0 to A16.

(2) RESET (Reset): Input

Input pin for setting the µPD78P4038Y to the PROM programming mode. When input on this pin is low, and

when the input voltage on the VPP pin goes +5 V or more, the µPD78P4038Y enters the PROM programming

mode.

(3) A0 to A16 (Address bus): Input

Address bus that selects an internal PROM address (0000H to 1FFFFH)

(4) D0 to D7 (Data bus): I/O

Data bus through which a program is written on or read from internal PROM

(5) CE (Chip enable): Input

This pin inputs the enable signal from internal PROM. When this signal is active, a program can be written or

read.

(6) OE (Output enable): Input

This pin inputs the read strobe signal to internal PROM. When this signal is made active for CE = low, a one-

byte program in the internal PROM cell selected by A0 to A16 can be read onto D0 to D7.

(7) PGM (Program): Input

The input pin for the operation mode control signal of the internal PROM.

Upon activation, writing to the internal PROM is enabled.

Upon inactivation, reading from the internal PROM is enabled.

(8) VDD

Positive power supply pin

(9) VSS

Ground potential pin

16

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