USBN9604 datasheet(13/60 Pages) NSC

Numer części	USBN9604

Szczegółowy opis	Universal Serial Bus Full Speed Node Controller with Enhanced DMA Support

PDF	60 Pages

Scroll/Zoom	100%

Producent	NSC [National Semiconductor (TI)]

Strona internetowa	http://www.national.com

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3.0

Parallel Interface

The parallel interface allows the device to function as a CPU or microcontroller peripheral. This interface type and its ad-

dressing mode (multiplexed or non-multiplexed) is determined via device input pins MODE0 and MODE1.

3.1

NON-MULTIPLEXED MODE

Non-multiplexed mode uses the control pins CS, RD, WR, the address pin A0 and the bidirectional data bus D7-0 as shown

in Figure 4. This mode is selected by tying both the MODE1 and MODE0 pins to GND.

The CPU has direct access to the DATA_IN, DATA_OUT and ADDR registers. Reading and writing data to the device can

be done either in standard access or burst mode. See Figure 5 for timing information.

Figure 5. Non-Multiplexed Mode Timing Diagram

0x00

0x3F

DATA_IN

D7-0

Data Out

Data In

DATA_OUT

ADDR

Address

Figure 4. Non-Multiplexed Mode Block Diagram

D7-0

Out

Input

Out

Write Address

Read Data

Burst Read Data

USBN9604 Arkusz danych(PDF) 13 Page - National Semiconductor (TI)