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参数资料
| 型号： | MCP3422EV |
| 厂商： | Microchip Technology |
| 文件页数： | 19/58页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL MCP3422 PICKIT SERIAL |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 1 |
| 系列： | PICkit™ |
| ADC 的数量： | 2 |
| 位数： | 18 |
| 采样率（每秒）： | 3.75 |
| 数据接口： | 串行 |
| 输入范围： | ±2.048 V |
| 工作温度： | -40°C ~ 125°C |
| 已用 IC / 零件： | MCP3422 |
| 已供物品： | 板 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3422A0T-E/SNTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-SOIC MCP3422A0T-E/MSTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-MSOP MCP3422A0T-E/MCTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-DFN MCP3422A0-E/SN-ND - IC ADC 18BIT3.75SPS 2CH 8-SOIC MCP3422A0-E/MS-ND - IC ADC 18BIT 3.75SPS 2CH 8-MSOP MCP3422A0-E/MC-ND - IC ADC 18BIT 3.75SPS 2CH 8-DFN |
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MCP3422/3/4
DS22088C-page 26
2009 Microchip Technology Inc.
5.6.5
ACKNOWLEDGE AND NON-
ACKNOWLEDGE
The Master (microcontroller) and the slave (MCP3422/
3/4) use an acknowledge pulse as a hand shake of
communication for each byte. The ninth clock pulse of
each byte is used for the acknowledgement. The clock
pulse
is
always
provided
by
the
Master
(microcontroller) and the acknowledgement is issued
by the receiving device of the byte (Note: The
transmitting device must release the SDA line during
the acknowledge pulse.). The acknowledgement is
achieved by pulling-down the SDA line “LOW” during
the 9th clock pulse by the receiving device.
During
reads,
the
Master
(microcontroller)
can
terminate the current read operation by not providing
an acknowledge bit (not Acknowledge (NAK)) on the
last byte. In this case, the MCP3422/3/4 devices
release
the
SDA
line
to
allow
the
Master
(microcontroller) to generate a STOP or repeated
START condition.
The
non-acknowledgement
(NAK)
is
issued
by
providing the SDA line to “HIGH” during the 9th clock
pulse.
FIGURE 5-7:
Data Transfer Sequence on I2C Serial Bus.
SCL
SDA
(A)
(B)
(D)
(A)
(C)
START
CONDITION
ADDRESS OR
ACKNOWLEDGE
VALID
DATA
ALLOWED
TO CHANGE
STOP
CONDITION
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