13

the minimum MISO data hold time of the ADNS-3530.

Since the falling edge of SCLK is actually the start of the

next read or write command, the ADNS-3530 will hold

the state of data on MISO until the falling edge of SCLK.

Required Timing Between Read and Write Commands

There are minimum timing requirements between read

and write commands on the serial port.

Figure 15. Timing between two write commands

If the rising edge of the SCLK for the last data bit of the

second write command occurs before the required delay

correctly.

Figure 16. Timing between write and read commands

If the rising edge of SCLK for the last address bit of the

the write command may not complete correctly.

Figure 17. Timing between read and either write or subsequent read commands

SCLK

tSWW

WRITE OPERATION

ADDRESS

DATA

WRITE OPERATION

ADDRESS

DATA

SCLK

tSWR

WRITE OPERATION

ADDRESS

DATA

NEXT READ OPERATION

ADDRESS

SCLK

tSRAD

READ OPERATION

ADDRESS

NEXT READ

or WRITE OPERATION

ADDRESS

tSRW & tSRR

DATA

PixArt Imaging Inc.

Low Power LED Integrated Slim Mouse Sensor

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PixArt Imaging Inc.