W51300 Просмотр технического описания (PDF) - Winbond

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W51300

FLASH VR CONTROLLER

Winbond 

W51300

9. MCU Interface

In CPU mode, five pins can be used as an MCU interface to communicate with external micro-

controllers by the counter method. RESET, ERASE, STOP are configured as input pins, while FWD

and BWD are configured as output pins. The application diagram is shown below.

Pin 0

Pin 1

Pin 2

Pin 3

Pin 4

Microcontroller

RESET

ERASE

STOP

FWD

BWD

W51300

The W51300 offers 10 operating modes that can be controlled by a microcontroller. The rising edge

of pin 1 informs the W51300 to begin to count the pulses generated on pin 2, and the falling edge of

pin 1 informs the W51300 to latch the pulse number. Then the number of pulses is decoded to

instruct the W51300 to perform various operations. The operating modes and the corresponding

waveforms are shown below.

Pin 1

Pin 2

T T1

Note: T is 5 µS minimum at FOSC = 768 KHz.

T1 is 10 µS minimum at FOSC = 768 KHz.

ITEM

1

2

3

4

5

6

7

MODE NAME

Record

Play

Erase

Stop (for record and play)

Memory Reset

System Reset

Read CAP (Current Address Pointer)

...

NUMBER OF PULSES ON PIN 2

1

2

3

4

5

6

7

Publication Release Date: April 1997

-7-

Revision A2

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