NEC PD75P402 User Manual download pdf (Page 27)

CHAPTER 2. PIN FUNCTIONS

2.3 PROM MODE

The PROM mode is designatable in the

PD75P402 alone.

2.3.1 A0 to A14 (Address) ..... Input

A 15-bit address input pin at PROM write/verify, read. As the PROM built into the

PD75P402 has 2K bytes, it is

addressed by the low-order 11 bits (A0 to A10). A11 to A14 should be fixed to the low level.

2.3.2 O0 to O7 (Data) ..... Input/Output

An 8-bit data input/output pin at PROM write/verify, read.

2.3.3 CE (Chip Enable) ..... Input

A chip enable signal input pin.

2.3.4 OE (Output Enable) ..... Input

An output enable signal input pin.

2.3.5 VPP

A high voltage application pin at PROM write/verify.

It must be connected to VSS during normal operation.

2.3.6 V

A supply voltage application pin.

2.3.7 VSS

A GND potential pin.

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NEC PD75P402 User Manual Page 27