MCP4341-103E/P Microchip Technology, MCP4341-103E/P Datasheet - Page 45
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MCP4341-103E/P
Manufacturer Part Number
MCP4341-103E/P
Description
Non-Volatile, 7-Bit (129 Wiper Steps) Digital Potentiometers; Package: 20-PDIP; Temperature Range: -40C to +125C; Container: Tube
Manufacturer
Microchip Technology
Datasheet
1.MCP4341-103EP.pdf
(80 pages)
- Current page: 45 of 80
- Download datasheet (2Mb)
6.2
The SPI module supports two (of the four) standard SPI
modes. These are Mode 0,0 and 1,1. The mode is
determined by the state of the SDI pin on the rising
edge of the 1st clock bit (of the 8-bit byte).
6.2.1
In Mode 0,0: SCK idle state = low (V
in on the SDI pin on the rising edge of SCK and clocked
out on the SDO pin on the falling edge of SCK.
FIGURE 6-2:
FIGURE 6-3:
© 2009 Microchip Technology Inc.
SCK
Write to
SSPBUF
SDI
Input
Sample
SCK
Write to
SSPBUF
SDI
Input
Sample
CS
SDO
CS
SDO
V
V
The SPI Modes
IH
IH
MODE 0,0
bit15
AD3
bit15 bit14 bit13 bit12
V
V
V
V
IL
IHH
IL
IHH
bit14 bit13 bit12 bit11
AD2
AD3
bit15 bit14 bit13 bit12
bit15 bit14 bit13 bit12 bit11
16-Bit Commands (Write, Read) - SPI Waveform (Mode 1,1).
16-Bit Commands (Write, Read) - SPI Waveform (Mode 0,0).
AD1
AD2
AD1
AD0
IL
), data is clocked
AD0
C1
bit10 bit9
C0
C1
bit9
bit10 bit9
CMDERR bit
C0
X
bit9
bit8
bit8
CMDERR bit
D8
X
bit7
bit8
bit7
bit8
D8
D7
6.2.2
In Mode 1,1: SCK idle state = high (V
clocked in on the SDI pin on the rising edge of SCK and
clocked out on the SDO pin on the falling edge of SCK.
6.3
Figure 6-2
command waveforms.
read and write commands.
are increment and decrement commands. The high
voltage increment and decrement commands are used
to enable and disable WiperLock Technology and Write
Protect.
bit6
bit6
bit7
bit7
D7
D6
bit5
bit5
bit6
bit6
D5
D6
SPI Waveforms
through
MODE 1,1
bit5
bit4
bit4
bit5
D4
D5
MCP434X/436X
bit3
bit4
bit3
bit4
D4
D3
Figure 6-5
bit2
bit2
bit3
bit3
Figure 6-2
D2
D3
bit1
bit1
bit2
bit2
Figure 6-4
D1
D2
show the different SPI
bit1
bit1
bit0
bit0
D1
D0
and
DS22233A-page 45
bit0
and
bit0
Figure 6-3
D0
IH
Figure 6-5
), data is
are
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