Silan

Semiconductors

SC84520

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

12

l. Status Request (E9)

When this command is issued by the system, SC84520 respond with a 3-byte status report as follows:

Byte

Bit

Description

1

0

1 = Right button pressed

1

1 = Middle button pressed

2

1 = Left button pressed

3

Reserved

4

0 = Normal speed, 1 = Autospeed

5

0 = Disabled, 1 = Enable

6

0 = Stream mode, 1 = Remote mode

7

Reserved

2

0-7

Current resolution setting (D0 – D7)

3

0-7

Current sampling rate (D0 – D7)

m. Set Resolution (E8, XX)

SC84520 provides four resolutions selected by the second byte of this command as follows:

Second Byte XX

Resolution

00

8 dots/count

01

4 dots/count

02

2 dots/count

03

1 dot/count

n. Set Autospeed (E7)

At the end of a sample interval in the stream mode, The current X and Y data values are converted new

values. The sign bits are not involved in this conversion. The conversion is only in stream mode. The

relationship between the input and output count follows:

Input

Output

00

11

21

33

46

59

N(

≥6)

2.0*N

o. Reset Autospeed (E6)

This command restore normal speed.