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參數(shù)資料
| 型號： | MCP4728-E/UN |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 25/33頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT W/I2C 10-MSOP |
| 視頻文件： | MCP4728 Evaluation Board Demo |
| 標準包裝： | 100 |
| 設(shè)置時間： | 6µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | EEPROM，I²C，串行 |
| 轉(zhuǎn)換器數(shù)目： | 4 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 4 電壓，單極 |
| 采樣率（每秒）： | * |
| 產(chǎn)品目錄頁面： | 673 (CN2011-ZH PDF) |
| 配用： | MCP4728EV-ND - BOARD EVAL 12BIT 4CH DAC MCP4728 |
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2010 Microchip Technology Inc.
DS22187E-page 31
MCP4728
5.4
I2C General Call Commands
The device acknowledges the general call address
command (0x00 in the first byte). The meaning of the
general call address is always specified in the second
byte. The I2C specification does not allow the use of
“00000000” (00h) in the second byte. Refer to the
Philips I2C document for more details of the General
Call specifications.
The MCP4728 device supports the following I2C
General Calls:
General Call Reset
General Call Wake-Up
General Call Software Update
General Call Read Address Bits
5.4.1
GENERAL CALL RESET
The
General Call Reset occurs if the second byte is
“00000110” (06h). At the acknowledgement of this
byte, the device will abort the current conversion and
perform the following tasks:
Internal Reset similar to a Power-on Reset (POR).
The contents of the EEPROM are loaded into
each DAC input and output registers immediately
VOUT will be available immediately regardless of
the LDAC pin condition
FIGURE 5-3:
General Call Reset.
5.4.2
GENERAL CALL WAKE-UP
If the second byte is “00001001” (09h), the device will
reset the Power-Down bits (PD1, PD0 = 0,0).
FIGURE 5-4:
General Call Wake-Up.
1st Byte
Note 1
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Stop
Start
2nd Byte
ACK (
MCP4728)
(General Call Command)
(Command Type = General Call Reset)
Clock Pulse (CLK Line)
Data (SDA Line)
Note 1: At this falling edge of the last ACK clock bit:
a. Startup Timer starts a reset sequence and
b. EEPROM data is loaded into the DAC Input and Output Registers immediately.
1st Byte
Note 1
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Stop
Start
2nd Byte
ACK (
MCP4728)
(General Call Command)
(Command Type = General Call Wake-Up)
Clock Pulse (CLK Line)
Data (SDA Line)
Note 1: Resets Power-Down bits at this falling edge of the last ACK clock bit.
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