ASC7531A ETC2 [List of Unclassifed Manufacturers], ASC7531A Datasheet - Page 6

• Manufacturer Part Number: ASC7531A
• Description: LOW-VOLTAGE 1-WIRE DIGITAL TEMPERATURE SENSOR AND VOLTAGE MONITOR
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

SST Interface
Multi Client Mode
Sensors operate in multi-client mode for read bit timing. Reference the SST Specification Version 1.0 for details.
SST Device Commands
GetDIB() Command (0xF7)
Read the Device Identifier Block (DIB). The read length of the command is either 8 or 16 bytes. 8 bytes is the minimum number of
bytes populated by a fixed address discoverable client.
Write Data Length:
Read Data Length:
Command Code:
Note: Un-shaded table entries are created by the host. Shaded entries are the response bytes from the aSC7531 to the host.
© Andigilog, Inc. 2006
5.0 V
4.992 V
1 V
0.0 V
-1 V
-4.992 V
-5.0 V
Target Address
Voltage
DIB Byte 1
0x48
(data)
8
8
Table 3. Voltage Representation
Sign
15
2’s complement representation
Integer Voltage 0 to 31V
14
0001 0100 0000 0000
0001 0011 1111 1000
0000 0100 0000 0000
0000 0000 0000 0000
1111 1100 0000 0000
1110 1100 0000 1001
1110 1100 0000 0000
Write Length
0x01
0x08/0x10
0xF7
13
0x01
(data)
…
8
8
12
Figure 4. GetDIB() Command (16-byte read length)
Host Sending
Hex Value
# Bits
11
10
Read Length
DIB Byte 15
Figure 3. Voltage Reading
0x10
(data)
●
8
8
www.andigilog.com
9
Fractional Voltage LSB = 1/128V
- 6 -
8
aSC7531 Sending
GetDIB Cmd
Actual aSC7531 reports are only positive in sign and 13-bits
or 7.8mV in resolution. The sign bit will always be 0 since the
measured voltages are only positive values. Below the
integer bits, the fractional voltage reported by the aSC7531
are bits 9 through 3, with LSB = 7.8mV. Bits 2 through 0 are
always zero. The aSC7531 cannot measure voltages greater
than 16V.
DIB Byte 16
7
Hex Value
# Bits
0xF7
8
8
(data)
6
aSC7531A / aSC7531B
5
(data dependent)
4
0xDC
FCS
FCS
8
8
3
2
December
Always Zero
1
2006 - 70A05012
0