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ATM90E32AS-AU-R Datasheet(PDF) 31 Page - ATMEL Corporation

Part # ATM90E32AS-AU-R
Description  Enhanced Poly-Phase High-Performance Wide-Span Energy Metering IC
PDF  84 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATM90E32AS-AU-R Datasheet(HTML) 31 Page - ATMEL Corporation

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M90E32AS [DATASHEET]
Atmel-46003B-SE-M90E32AS-Datasheet_02122015
Figure-17 Read Sequence
Write Sequence:
Figure-18 Write Sequence
4.2.2
RELIABILITY ENHANCEMENT FEATURE
The SPI read/write transaction is CS-low defined. Each transaction can only access one register.
Within each CS-low defined transaction:
Write: access occurs only when CS goes from low to high and there are exactly 32 SCLK cycles received during CS low
period.
Read: if SCLK>=16 (full address received), data is read out from internal registers and gets to the SDO pin; and the LastS-
PIData register is updated. The R/C registers can only be cleared after the LastSPIData register is updated.
CS
SCLK
SDI
SDO
10
1
2
3
4
5
6
7
8
9
111213141516171819202122
24
A3
A6
A5
A4
Register Address
High Impedance
D15
Don't care
D0
16-bit data
23
D14 D13 D12 D11 D10 D9
D8
D7 D6
D5
D4 D3 D2
D1
25
26
A2
A1
A0
27
28
29
30
31
32
A8
X
X
X
X
X
A7
A9
CS
SCLK
SDI
SDO
10
1
234
5678
9
11
12
13
14
15
16
17
18
19
20
21
22
23
A3
A7
A6
A5
A4
16-bit data
High Impedance
D0
D7
D6
D5
D4
D3
D2
D1
Register Address
D15
24
D14D13 D12D11 D10 D9
D8
A0
A1
A2
25
26
27
28
29
30
31
32
A8
X
X
X
X
X
A9



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