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MCP3909 Datasheet(PDF) 32 Page - Microchip Technology

Part # MCP3909
Description  Energy Metering IC with SPI Interface and Active Power Pulse Output
PDF  44 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3909 Datasheet(HTML) 32 Page - Microchip Technology

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MCP3909
DS22025B-page 32
© 2009 Microchip Technology Inc.
FIGURE 5-8:
Dual Channel Output Mode SPI Communication using 8-bit segments
(Mode 0,1: SCK idles low).
1
2
3
4
5
6
7
8
9
10
11
1213
1415
16
D14 D13 D12 D11
D7
D6 D5
D4 D3 D2 D1 D0
MCU latches data from
Data is clocked out
on rising edges
Device on falling edges of SCK
Don’t Care
X
XX
X
X
X
X
D7
D6 D5
D4 D3
D2 D1
D0
D11 D10 D9 D8
X
X
X
MCU Transmit Buffer
MCU Receive Buffer
X
CH0 Data stored into MCU receive regis-
ter after transmission of first 8 bits
CH0 Data stored into MCU receive register
after transmission of second 8 bits
D15
D10 D9 D8
X
X
X
X
X
D15 D14 D13 D12
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
MCU latches data from
Data is clocked out
on rising edges
Device on falling edges of SCK
Don’t Care
X
XX
X
X
X
X
D7
D6 D5
D4 D3
D2 D1
D0
D11 D10 D9 D8
X
X
X
MCU Transmit Buffer
MCU Receive Buffer
X
CH1 Data stored into MCU receive regis-
ter after transmission of third 8 bits
CH1 Data stored into MCU receive register
after transmission of fourth 8 bits
X
X
X
X
X
D15 D14 D13 D12
CHANNEL 0
CHANNEL 1
D14 D13 D12 D11
D7
D6 D5
D4 D3 D2 D1 D0
D15
D10 D9 D8
F1 / SDI
F2 / SCK
NEG / SDO
F0 / CS
F1 / SDI
F2 / SCK
NEG / SDO
F0 / CS



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