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MCP413X 데이터시트(PDF) 44 Page - Microchip Technology

부품명 MCP413X
상세설명  7/8-Bit Single/Dual SPI Digital POT with Volatile Memory
PDF  88 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP413X 데이터시트(HTML) 44 Page - Microchip Technology

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MCP413X/415X/423X/425X
DS22060B-page 44
© 2008 Microchip Technology Inc.
6.2
The SPI Modes
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
MODE 0,0
In Mode 0,0: SCK idle state = low (VIL), data is 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.
6.2.2
MODE 1,1
In Mode 1,1: SCK idle state = high (VIH), data is
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
SPI Waveforms
Figure 6-3 through Figure 6-8 show the different SPI
command waveforms. Figure 6-3 and Figure 6-4 are
read and write commands. Figure 6-5 and Figure 6-6
are read commands when the SDI and SDO pins are
multiplexed on the same pin (SDI/SDO). Figure 6-7
and Figure 6-8
are
increment and decrement
commands.
FIGURE 6-3:
16-Bit Commands (Write, Read) - SPI Waveform (Mode 1,1).
FIGURE 6-4:
16-Bit Commands (Write, Read) - SPI Waveform (Mode 0,0).
CS
SCK
Write to
SSPBUF
SDI
Input
Sample
SDO
bit15 bit14 bit13 bit12 bit11 bit10 bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
bit15 bit14 bit13 bit12
bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
AD3 AD2 AD1
AD0
C1
C0
X
D8
D7
D6
D5
D4
D3
D2
D1
D0
VIH
VIL
CMDERR bit
VIHH (1)
Note 1: VIHH is supported for compability with the MCP414X/6X and MCP424X/6X devices high voltage
operation.
CS
SCK
Write to
SSPBUF
SDI
Input
Sample
SDO
bit15
bit14 bit13 bit12 bit11 bit10 bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
bit15 bit14 bit13 bit12
bit9
bit8
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
AD3 AD2 AD1
AD0
C1
C0
X
D8
D7
D6
D5
D4
D3
D2
D1
D0
VIH
VIL
CMDERR bit
VIHH(1)
Note 1: VIHH is supported for compability with the MCP414X/6X and MCP424X/6X devices high voltage
operation.



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