ASC7521A 查看數據表（PDF） - Unspecified
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ASC7521A Datasheet PDF : 18 Pages
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aSC7521A
Write Data Length:
Read Data Length:
Command Code:
0x01
0x04
0x00
Optional SST Device Commands
The optional SST commands Alert(), Suspend() are not supported in the aSC7521A.
Vendor Specific Extensions
The vendor specific command codes are in the range from 0xE0 and 0xE7. Reading and writing to specific internal registers is
provided for custom tuning of sensor response characteristics.
WriteReg()
Writes to the sensor’s internal registers.
Write Data Length:
Read Data Length:
Command Code:
2+N (command + address + Number of bytes to write)
0x00
0xE0
Example bus transaction to write to a sensor located at address 0x48. This example writes 2 consecutive locations (0x20 and 0x21)
to values 0x25 and 0x28.
8
Target Address
0x48
8
Write Length
0x04
8
Read Length
0x00
8
Command
0xE0
8
RAM Addr
0x20
8
8
8
Write Data
Write Data
FCS
0x25
0x28
0x1B
Figure 9. Example Register Write
ReadReg()
Reads from the sensor’s internal registers.
Write Data Length:
Read Data Length:
Command Code:
0x02 (command + address)
N (Number of bytes to read)
0xE1
Example bus transaction to read a sensor located at address 0x48. This example reads 2 consecutive locations (0x20 and 0x21).
8
Target Address
0x48
8
Write Length
0x02
8
Read Length
0x02
8
Command
0xE1
8
RAM Addr
0x20
8
FCS
0x9D
8
Read Data
8
Read Data
0x25
0x28
Figure 10. Example Register Read
FCS
0x37
VenCmdEnable()
Vendor Command Enable enables the Vendor Specified Extensions.
Write Data Length:
Read Data Length:
Command Code:
© Andigilog, Inc. 2006
0x01
0x00
0xE2
-8-
www.andigilog.com
October 2006 - 70A05011
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