ADNS-7700-HAMY 데이터 시트보기 (PDF) - Avago Technologies

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ADNS-7700-HAMY

One chip USB LaserStream™ Mouse Sensors

Avago Technologies 

OTP Byte Read Operation

OTP read operation flow chart is shown in Figure 17.

1. Set OTP enable bit in OTP_CONFIG register, 0x4C:

OTP_EN = 1.

2. Write the OTP register address byte to OTP_ADDR

register, 0x4D.

3. Set read enable bit in OTP_CTRL register, 0x4F to enable

write command to OTP: RD = 1.

4. Read the read enable bit status in OTP_CTRL register,

0x4F. If RD = 1, repeat reading the bit status until it is

clear.

5. Read the OTP data byte from OTP_DATA register, 0x4E

to complete the OTP read operation.

6. Repeat Step 2 for more OTP read operations.

0x4F: OTP_CTRL [1] = 1

0x4F: OTP_CTRL [1]

0x4E: OTP_DATA [7:0]

Start

Write OTP enable bit

Write OTP addr byte

Write OTP read bit

Read OTP read bit

No

bit = 0?

Yes

Yes

Read OTP data

OTP read done

0x4C: OTP_CONFIG [0] = 1

0x4D: OTP_ADDR [7:0]

Figure 17. OTP Byte Read Flow Chart

More bytes?

No

Done

18

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