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MCP3004-I/ST Datasheet(PDF) 18 Page - Microchip Technology

Part # MCP3004-I/ST
Description  2.7V 4-Channel/8-Channel 10-Bit A/D Converters with SPI??Serial Interface
PDF  34 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3004-I/ST Datasheet(HTML) 18 Page - Microchip Technology

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MCP3004/3008
DS21295C-page 18
© 2007 Microchip Technology Inc.
FIGURE 6-1:
SPI Communication with the MCP3004/3008 using 8-bit segments (Mode 0,0: SCLK idles low).
FIGURE 6-2:
SPI Communication with the MCP3004/3008 using 8-bit segments (Mode 1,1: SCLK idles high).
1
2
3
4
5
6
7
8
9
10
1112
13
1415
16
CS
SCLK
DIN
X = “Don’t Care” Bits
17
18
19
20
21
22
23
24
DOUT
NULL
BIT B9 B8
B7
B6 B5
B4 B3 B2 B1 B0
HI-Z
MCU latches data from A/D
Data is clocked out of
A/D converter on falling edges
converter on rising edges of SCLK
Don’t Care
SGL/
DIFF
D1
D2
Start
00
0
0
0
1
XX
X
X
DO
XXX
X
X
XX
X
B7 B6 B5 B4 B3 B2 B1 B0
B9 B8
0
???
??
??
??
?
D1
D2
SGL/
DIFF
Start
Bit
(Null)
MCU Transmitted Data
(Aligned with falling
edge of clock)
MCU Received Data
(Aligned with rising
edge of clock)
Data stored into MCU receive
register after transmission of first
8 bits
Data stored into MCU receive
register after transmission of
second 8 bits
Data stored into MCU receive
register after transmission of last
8 bits
DO
?
?
00
?
MCU Transmitted Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CS
SCLK
DIN
X = “Don’t Care” Bits
17
18
19
20
21 22
23
24
DOUT
DO
Don’t Care
NULL
BIT B9
B8
B6 B5 B4 B3 B2 B1 B0
HI-Z
00
0
0
0
1
XX
X
X
DO
SGL/
DIFF
XXX
X
X
XX
X
B7 B6 B5
B4 B3 B2 B1 B0
B9 B8
0
?????
???
???
MCU latches data from A/D converter
on rising edges of SCLK
Data is clocked out of A/D
converter on falling edges
D1
D2
SGL
/
DIFF
Start
Bit
(Null)
D1
D2
Start
MCU Transmitted Data
(Aligned with falling
edge of clock)
MCU Received Data
(Aligned with rising
edge of clock)
B7
Data stored into MCU receive
register after transmission of first
8 bits
Data stored into MCU receive
register after transmission of
second 8 bits
Data stored into MCU receive
register after transmission of last
8 bits
?
?
00



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