參數(shù)資料
型號: X9261US24Z-2.7T1
廠商: Intersil
文件頁數(shù): 17/20頁
文件大?。?/td> 0K
描述: IC XDCP DUAL 256TAP 50K 24-SOIC
標準包裝: 1,000
系列: XDCP™
接片: 256
電阻(歐姆): 50k
電路數(shù): 2
溫度系數(shù): 標準值 ±300 ppm/°C
存儲器類型: 非易失
接口: 6 線 SPI(芯片選擇,設備位址)
電源電壓: 2.7 V ~ 5.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 24-SOIC
包裝: 帶卷 (TR)
6
FN8171.4
October 12, 2006
Table 1. Wiper Counter Register, WCR (8-bit), WCR[7:0]: Used to store the current wiper position (Volatile, V).
Table 2. Data Register, DR (8-bit), Bit [7:0]: Used to store wiper positions or data (Nonvolatile, NV).
DEVICE DESCRIPTION
Instructions
IDENTIFICATION BYTE ( ID AND A )
The first byte sent to the X9261 from the host,
following a CS going HIGH to LOW, is called the
Identification Byte. The most significant four bits of the
slave address are a device type identifier. The ID[3:0]
bits is the device id for the X9261; this is fixed as
0101[B] (refer to Table 3).
The AD[3:0] bits in the ID byte is the internal slave
address. The physical device address is defined by
the state of the A3 - A0 input pins. The slave address
is externally specified by the user. The X9261
compares the serial data stream with the address
input state; a successful compare of both address bits
is required for the X9261 to successfully continue the
command sequence. Only the device which slave
address matches the incoming device address sent
by the master executes the instruction. The A3-A0
inputs can be actively driven by CMOS input signals
or tied to VCC or VSS.
INSTRUCTION BYTE ( I[3:0] )
The next byte sent to the X9261 contains the instruction
and register pointer information. The three most
significant bits are used provide the instruction opcode
(I[3:0]). The RB and RA bits point to one of the four
Data Registers of each associated XDCP. The least
significant bit points to one of two Wiper Counter
Registers or Pots.The format is shown below in Table 4.
Table 3. Identification Byte Format
Table 4. Instruction Byte Format
WCR7
WCR6
WCR5
WCR4
WCR3
WCR2
WCR1
WCR0
VVVVVVVV
(MSB)
(LSB)
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
NV
MSB
LSB
ID3
ID2
ID1
ID0
A3
A2
A1
A0
010
1
(MSB)
(LSB)
Device Type
Identifier
Slave Address
I3
I2
I1
I0
RB
RA
0
P0
(MSB)
(LSB)
Instruction
Register
Pot Selection
Opcode
Selection
(WCR Selection)
Data
X9261
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