DMX250 datasheet(20/28 Pages) YAMAR

20 / 28 page

Data may be changed without notice - Proprietary information of Yamar Electronics Ltd.

DS-DMX250 R 0.80

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st byte is the write command byte.

nd byte is the designated control register address to write to.

rd byte is the data byte value to write.

For example, writing 0x34 to REG_3 (address 0x03) preformed as follows:

1. Lower the HDC pin (Enter Command mode).

2. Wait at least 100nsec

3. Transfer 3 bytes: [0xF5][0x03][0x34]

4. The value 0x34 is written to REG_3.

5. Wait for at least 100ns.

6. Raise the HDC pin (Exit Command mode to Normal mode).

5.10.2

READ-REG command

A READ-REG command consists of 2 bytes as described in Table 13.

Table 13 - READ-REG command structure

st Byte

nd Byte

0xFD

Control register address

st byte is the Read command byte.

nd byte is the designated register address to read from.

Following the second byte, the DMX250 outputs the register value to DMX-controller.

For example, reading from REG_2 (address 0x02) is performed as follows:

1. Lower the HDC pin (Enter Command mode).

2. Wait at least 100nsec

3. Transfer 2 bytes: [0xFD][0x02]

4. Wait for the DMX250 to output the value of REG_2.

5. Wait for at least 100ns.

6. Raise the HDC pin (Exit Command mode to Normal mode).

DMX250 Datasheet(PDF) 20 Page - Yamar Electronics Ltd.