MCP3304 Microchip Technology, MCP3304 Datasheet - Page 26

• Manufacturer Part Number: MCP3304
• Description: 13-Bit Differential Input, Low Power A/D Converter with SPI Serial Interface
• Manufacturer: Microchip Technology

MCP3302/04
FIGURE 7-4:
idles low).
FIGURE 7-5:
idles high).
DS21697C-page 26
? = Unknown Bits
X = Don’t Care Bits
MCU Transmitted Data
(Aligned with falling
edge of clock)
MCU Received Data
(Aligned with rising
edge of clock)
? = Unknown Bits
? = Unknown Bits
X = Don’t Care Bits
MCU Transmitted Data
(Aligned with falling
edge of clock)
MCU Received Data
(Aligned with rising
edge of clock)
SCLK
D
OUT
D
CS
SCLK
D
IN
OUT
D
CS
IN
MCU latches data from A/D Converter
on rising edges of SCLK
MCU latches data from A/D Converter
on rising edges of SCLK
1
0
?
Data stored into MCU receive register
after transmission of first 8 bits
1
?
0
Data stored into MCU receive register
after transmission of first 8 bits
2
SPI Communication with the MCP3302/04 using 8-bit segments (Mode 0,0: SCLK
SPI Communication with the MCP3302/04 using 8-bit segments (Mode 1,1: SCLK
0
?
2
?
0
3
0
?
3
?
0
4
HI-Z
0
?
HI-Z
4
Start
0
?
Start
5
Data is clocked out of
A/D Converter on falling edges
1
?
Start
5
SGL/
DIFF
Bit
?
1
Data is clocked out of
A/D Converter on falling edges
Start
SGL/
DIFF
6
SGL/
DIFF
Bit
?
6
SGL/
DIFF
?
D2
7
D2
D2
7
?
D2
?
D1
8
D1
?
D1
D1
?
8
D0
DO
9
D0
?
Data stored into MCU receive register
after transmission of second 8 bits
DO
9
?
Data stored into MCU receive register
after transmission of second 8 bits
10
X
?
NULL
10
BIT
X
?
NULL
(Null)
11
BIT
X
0
11
(Null)
SB
X
0
12
SB
SB
12
X
SB
B11 B10 B9
X
13
B11 B10 B9
B11 B10 B9
13
X
B11 B10 B9
X
14
14
X
X
15
15
X
X
B8
16
B8
X
B8
X
B8
16
B7
17
Don’t Care
B7
Don’t Care
X
B7
Don’t Care
17
Data stored into MCU receive register
after transmission of last 8 bits
B7
X
B6
Data stored into MCU receive register
after transmission of last 8 bits
18
B6
X
© 2007 Microchip Technology Inc.
B6 B5
18
B6
X
B5
19
B5
X
19
B5
X
B4
20
B4
B4
X
20
B4
X
B3
21
B3
X
21
B3
B3
X
B2
22
B2
22
B2
X
B2
X
B1
23
B1
23
X
B1
B1
X
B0
24
B0
B0
X
24
B0
X