L99H01 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'L99H01' PDF : 53 Pages View PDF
L99H01
Functional description of the SPI
Equation 1
Vth = n * (0.31 + m * 0.03) V
The purpose of factor n is to determine the number of external temperature sense diodes (in
series). With factor m the level of the threshold voltage can be fine tuned.
4.7
Read device information (ROM)
The device information is stored at the ROM addresses defined below and is read using the
respective operating code.
Op code
OC1
OC0
1
1
1
1
1
1
1
1
1
1
Table 43. Read device information (ROM)
Address
Ax
Device information
00H
<ID-Header>
01H
<Product Code 1>
02H
<Product Code 2>
03H
<SPI-frame-ID>
3FH
Reserved, accessing this address is recognized as a failure, the
device enters a fail-safe state (see Table 30: STK_RESET_Q).
The <ID-Header> indicates the product family and specifies how many bytes of device
information are available.
Table 44. Address 0 <00(hex)> : ID-header - read only(1)
Bit
7
6
5
4
3
2
1
0
Name FAM_1 FAM_0 NR_PI_5 NR_PI_4 NR_PI_3 NR_PI_2 NR_PI_1 NR_PI_0
<default> 0
1
0
0
0
0
1
0
1. Addressable only through a read device information command.
• FAM[1:0]: Family identifier, FAM[1:0] = [0:1] stands for ASSPs.
• NR_PI[5:0]: Number of product information bytes.
The <Product Code 1 and 2> represents a unique identifier of the device and version.
Table 45. Address 1 <01(hex)>: product ID (LSB) - read only(1)
Bit
7
6
5
4
3
2
1
0
Name PR_ID_7 PR_ID_6 PR_ID_5 PR_ID_4 PR_ID_3 PR_ID_2 PR_ID_1 PR_ID_0
<default>
0
0
0
0
0
0
0
1
1. Addressable only through a read device information command.
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