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AS8267 Datasheet(PDF) 74 Page - ams AG

Part # AS8267
Description  Single-Phase 2-Current Energy Measurement Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os
PDF  136 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS8267 Datasheet(HTML) 74 Page - ams AG

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Data Sheet AS8267 / AS8268
Revision 1.0, 19-Jun-07
Page 74 of 136
For the data to be actually written, the S_N must be brought high after the least significant bit (D0) of the n
th data byte has
been clocked in. If S_N is brought high at any other time, the write operation will not be completed. While the write is in
progress, the status register may be read to check the status. A read attempt of a memory array location will not be possible
during a write cycle. When the write cycle is completed, the write enable latch is reset.
Byte Write
MISO
MOSI
15
14
13
12
0
0
0
0
0
0
1
0
2
1
0
7
6
5
4
3
2
1
0
S_N
High Impedance
Instruction
16 Bit Address
Data Byte
TWC
SC
012
8
3
4
567
9
10
11
21
31
22
23
24
25
26
27
28
29
30
Page Program (max. 64 bytes)
01
2
8
3
4
567
9
10
11
21
31
22
23
24
25
26
27
28
29
30
15
14
13
12
0
0
0
0
0
0
1
0
2
1
0
7
6
5
4
3
2
1
0
Instruction
16 Bit Address
Data Byte 1
SC
S_N
45
44
42
32
41
40
39
38
37
36
35
34
33
43
46
47
7
6
5
4
3
2
1
0
Data Byte 2
7
6
5
4
3
2
1
0
Data Byte 3
MISO
7
6
5
4
3
2
1
0
Data Byte n (64 max)
SC
MISO
S_N
Example PROG Page Sequence
1.
0x01
… set REQ bit by writing 0x04 to status register
2.
0x04
… -“-
3.
0x05
… read Flash status register until Flash is ready
4.
0x06
… set Flash write enable
5.
0x02
… write Flash instruction
6.
0x00
… Start address, e.g. 80h
7.
0x80
… -“-
8.
Dat0
… put byte 0 to address
9.
Dat1
… put byte 1 to address + 1
10. …
… max. 64 bytes (page size), then repeat sequence from step 2.
11. 0x01
… clear REQ bit by writing 0x00 to status register
12. 0x00
… -“-



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