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參數資料
| 型號： | MCP4716A0T-E/MAY |
| 廠商： | Microchip Technology |
| 文件頁數： | 39/86頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT NV EEP I2C 6DFN |
| 標準包裝： | 1 |
| 設置時間： | 6µs |
| 位數： | 10 |
| 數據接口： | EEPROM，I²C，串行 |
| 轉換器數目： | 1 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 1.10W |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-VDFN 裸露焊盤 |
| 供應商設備封裝： | 6-DFN（2x2） |
| 包裝： | 標準包裝 |
| 輸出數目和類型： | 1 電壓，單極 |
| 采樣率（每秒）： | * |
| 其它名稱： | MCP4716A0T-E/MAYDKR |
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MCP4706/4716/4726
DS22272C-page 44
2011-2012 Microchip Technology Inc.
5.3
I2C Operation
The MCP47X6’s I2C module is compatible with the
NXP I2C specification. The following lists some of the
module’s features:
7-bit slave addressing
Supports three clock rate modes:
- Standard mode, clock rates up to 100 kHz
- Fast mode, clock rates up to 400 kHz
- High-speed mode (HS mode), clock rates up
to 3.4 MHz
Support multi-master applications
General call addressing (Reset and Wake-Up
commands)
The I2C 10-bit Addressing mode is not supported.
The NXP I2C specification only defines the field types,
field lengths, timings, etc. of a frame. The frame
content defines the behavior of the device. The frame
content for the MCP47X6 is defined in Section 6.0
5.3.1
I2C BIT STATES AND SEQUENCE
clock is generated by the master. The following
definitions are used for the bit states:
Start bit (S)
Data bit
Acknowledge (A) bit (driven low) /
No Acknowledge (A) bit (not driven low)
Repeated Start bit (Sr)
Stop bit (P)
5.3.1.1
Start Bit
The Start bit (see Figure 5-2) indicates the beginning of
a data transfer sequence. The Start bit is defined as the
SDA signal falling when the SCL signal is “High”.
FIGURE 5-2:
Start Bit.
5.3.1.2
Data Bit
The SDA signal may change state while the SCL signal
is Low. While the SCL signal is High, the SDA signal
MUST be stable (see Figure 5-3).
FIGURE 5-3:
Data Bit.
5.3.1.3
Acknowledge (A) Bit
The A bit (see Figure 5-4) is typically a response from
the receiving device to the transmitting device.
Depending on the context of the transfer sequence, the
A bit may indicate different things. Typically, the slave
device will supply an A response after the Start bit and
8 “data” bits have been received. An A bit has the SDA
signal low.
FIGURE 5-4:
Acknowledge Waveform.
Not A (A) Response
The A bit has the SDA signal high. Table 5-1 shows
some of the conditions where the slave device will
issue a Not A (A).
If an error condition occurs (such as an A instead of A),
then a Start bit must be issued to reset the command
state machine.
SDA
SCL
S
1st Bit
2nd Bit
SDA
SCL
Data Bit
1st Bit
2nd Bit
TABLE 5-1:
MCP47X6 A/A RESPONSES
Event
Acknowledge
Bit
Response
Comment
General Call
A
Slave Address
valid
A
Slave Address
not valid
A
Communication
during
EEPROM write
cycle
A
After device has
received address
and command,
and valid
conditions for
EEPROM write
Bus Collision
N/A
I2C module
Resets, or a
“Don’t Care” if
the collision
occurs on the
Master’s “Start
bit”
A
8
D0
9
SDA
SCL
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