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| 型号： | MCP4461T-503E/ML |
| 厂商： | Microchip Technology |
| 文件页数： | 54/100页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT 257TAPS 50K 20QFN |
| 标准包装： | 3,300 |
| 接片： | 257 |
| 电阻（欧姆）： | 50k |
| 电路数： | 4 |
| 温度系数： | 标准值 150 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
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2010 Microchip Technology Inc.
DS22265A-page 57
MCP444X/446X
6.2.6
HS MODE
The I2C specification requires that a high-speed mode
device must be ‘activated’ to operate in high-speed
(3.4 Mbit/s) mode. This is done by the Master sending
a special address byte following the START bit. This
byte is referred to as the high-speed Master Mode
Code (HSMMC).
The MCP44XX device does not acknowledge this byte.
However, upon receiving this command, the device
switches to HS mode. The device can now
communicate at up to 3.4 Mbit/s on SDA and SCL
lines. The device will switch out of the HS mode on the
next STOP condition.
The master code is sent as follows:
1.
START condition (S)
2.
High-Speed Master Mode Code (0000 1XXX),
The XXX bits are unique to the high-speed (HS)
mode Master.
3.
No Acknowledge (A)
After switching to the High-Speed mode, the next
transferred byte is the I2C control byte, which specifies
the device to communicate with, and any number of
data bytes plus acknowledgements. The Master
Device can then either issue a Repeated Start bit to
address a different device (at High-Speed) or a Stop bit
to return to Fast/Standard bus speed. After the Stop bit,
any other Master Device (in a Multi-Master system) can
arbitrate for the I2C bus.
See Figure 6-10 for illustration of HS mode command
sequence.
For more information on the HS mode, or other I2C
modes, please refer to the Phillips I2C specification.
6.2.6.1
Slope Control
The slope control on the SDA output is different
between the Fast/Standard Speed and the High-Speed
clock modes of the interface.
6.2.6.2
Pulse Gobbler
The pulse gobbler on the SCL pin is automatically
adjusted to suppress spikes < 10 ns during HS mode.
FIGURE 6-10:
HS Mode Sequence.
S
A
‘0 0 0 0 1 X X X’b
Sr
A
‘Slave Address’
A/A
“Data”
P
S = Start bit
Sr = Repeated Start bit
A = Acknowledge bit
A = Not Acknowledge bit
R/W = Read/Write bit
R/W
P = Stop bit (Stop condition terminates HS Mode)
F/S-mode
HS-mode
HS-mode continues
F/S-mode
Sr
A
‘Slave Address’ R/W
HS Select Byte
Control Byte
Command/Data Byte(s)
Control Byte
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP4462-103E/ST | 功能描述:数字电位计 IC 10k I2C Quad Ch 8bit Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MCP4462-103E/ST | 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:10kohm; Track Ta 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 10kohm, 257STEPS, QUAD, TSSOP-14 |
| MCP4462-104E/ST | 功能描述:数字电位计 IC 100k I2C Quad Ch 8bt Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| MCP4462-104E/ST | 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:100kohm; Track T 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 100kohm, 257STEPS, QUAD, TSSOP-14 |
| MCP4462-502E/ST | 制造商:Microchip Technology 功能描述:Digital Potentiometer 256POS 5KOhm Quad 14-Pin TSSOP Tube 制造商:Microchip Technology Inc 功能描述:5K, I2C, QUAD CHANNEL, 8-BIT, NONVOLATILE MEMORY - Rail/Tube 制造商:Microchip Technology Inc 功能描述:IC DGTL POT 257POS 5K 14TSSOP 制造商:Microchip Technology Inc 功能描述:50k,I2C,quadchan 8b non vol mem |
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