FIGURE 5-1: Timing Diagram for Writing Instructions or Data to a Digital Pot" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MCP41010T-I/SN
寤犲晢锛� Microchip Technology
鏂囦欢闋佹暩(sh霉)锛� 10/28闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC POT DIGITAL 10K 1CH SPI 8SOIC
妯欐簴鍖呰锛� 3,300
鎺ョ墖锛� 256
闆婚樆锛堟瓙濮嗭級锛� 10k
闆昏矾鏁�(sh霉)锛� 1
婧害绯绘暩(sh霉)锛� 妯欐簴鍊� 800 ppm/°C
瀛樺劜鍣ㄩ鍨嬶細 鏄撳け
鎺ュ彛锛� 3 绶氫覆琛岋紙鑺墖閬告搰锛�
闆绘簮闆诲锛� 2.7 V ~ 5.5 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 8-SOIC锛�0.154"锛�3.90mm 瀵級
渚涙噳鍟嗚ō鍌欏皝瑁濓細 8-SOICN
鍖呰锛� 甯跺嵎 (TR)
MCP41XXX/42XXX
DS11195C-page 18
2003 Microchip Technology Inc.
FIGURE 5-1:
Timing Diagram for Writing Instructions or Data to a Digital Potentiometer.
FIGURE 5-2:
Command Byte Format.
SO
SI
SCK
CS
2345
67
8
9 10
1
New Register Data
D7 D6 D5 D4 D3 D2 D1 D0
P1* P0
11 12 13 14 15 16
X
C1 C0 X
X
Channel
Select
Bits
Data Registers are
loaded on rising
edge of CS. Shift
First 16 bits shifted out will always be zeros
Don鈥檛
Care
Bits
Command
Bits
Don鈥檛
Care
Bits
There must always be multiples of 16 clocks while CS is low or commands will abort.
The serial data out pin (SO) is only available on the MCP42XXX device.
* P1 is a 鈥榙on鈥檛 care鈥� bit for the MCP41XXX.
COMMAND Byte
Data Byte
X
register is loaded
with zeros at this time.
Data is always latched
in on the rising edge
Data is always clocked out
of the SO pin after the
SO pin will always
drive low when CS
goes high.
of SCK.
falling edge of SCK.
P1* P0
Potentiometer Selections
0
Dummy Code: Neither Potentiometer
affected.
0
1
Command executed on
Potentiometer 0.
1
0
Command executed on
Potentiometer 1.
1
Command executed on both
Potentiometers.
P0
P1*
XX
X
XC1 C0
COMMAND BYTE
C1 C0 Command
Command Summary
0
None
No Command will be executed.
0
1
Write Data
Write the data contained in Data Byte to the
potentiometer(s) determined by the potenti-
ometer selection bits.
1
0
Shutdown
Potentiometer(s) determined by potentiome-
ter selection bits will enter Shutdown Mode.
Data bits for this command are 鈥榙on鈥檛 cares鈥�.
1
None
No Command will be executed.
Command
Selection
Bits
Potentiometer
Selection
Bits
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