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| 型号： | ADM1062ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 29/36页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER/SUPERVISOR 40LFCSP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 类型： | 序列发生器 |
| 监视电压数目： | 10 |
| 输出： | 可编程 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-VQ（6x6） |
| 包装： | 托盘 |
| 配用： | EVAL-ADM1062TQEBZ-ND - BOARD EVALUATION FOR ADM1062TQ |
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ADM1062
The device also has several identification registers (read-only)
that can be read across the SMBus. Table 13 lists these registers
with their values and functions.
Table 13. Identification Register Values and Functions
All other devices on the bus remain idle while the selected device
waits for data to be read from or written to it. If the R/W bit is
a 0, the master writes to the slave device. If the R/W bit is a 1,
the master reads from the slave device.
Name
MANID
REVID
MARK1
MARK2
Address
0xF4
0xF5
0xF6
0xF7
Value
0x41
0x02
0x00
0x00
Function
Manufacturer ID for Analog Devices
Silicon revision
Software brand
Software brand
Step 2
Data is sent over the serial bus in sequences of nine clock pulses:
eight bits of data followed by an acknowledge bit from the slave
device. Data transitions on the data line must occur during the
low period of the clock signal and remain stable during the high
General SMBus Timing
general read and write operations using the SMBus. The SMBus
specification defines specific conditions for different types of
read and write operations, which are discussed in the Write
Operations and Read Operations sections.
The general SMBus protocol operates as follows:
Step 1
The master initiates data transfer by establishing a start condition,
defined as a high-to-low transition on the serial data-line SDA,
while the serial clock-line SCL remains high. This indicates that
a data stream follows. All slave peripherals connected to the
serial bus respond to the start condition and shift in the next eight
bits, consisting of a 7-bit slave address (MSB first) plus an R/W
bit. This bit determines the direction of the data transfer, that is,
whether data is written to or read from the slave device (0 =
write, 1 = read).
The peripheral whose address corresponds to the transmitted
address responds by pulling the data line low during the low
period before the ninth clock pulse, known as the acknowledge
bit, and by holding it low during the high period of this clock pulse.
period because a low-to-high transition when the clock is high
could be interpreted as a stop signal. If the operation is a write
operation, the first data byte after the slave address is a command
byte. This command byte tells the slave device what to expect next.
It may be an instruction telling the slave device to expect a block
write, or it may be a register address that tells the slave where subse-
quent data is to be written. Because data can flow in only one
direction, as defined by the R/W bit, sending a command to a
slave device during a read operation is not possible. Before a read
operation, it may be necessary to perform a write operation to
tell the slave what sort of read operation to expect and/or the
address from which data is to be read.
Step 3
When all data bytes have been read or written, stop conditions
are established. In write mode, the master pulls the data line
high during the 10th clock pulse to assert a stop condition. In
read mode, the master device releases the SDA line during the
low period before the ninth clock pulse, but the slave device
does not pull it low. This is known as a no acknowledge. The
master then takes the data line low during the low period before
the 10th clock pulse and then high during the 10th clock pulse
to assert a stop condition.
1
9
1
9
SCL
SDA
0
0
1
0
1
A1
A0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
START BY
MASTER
FRAME 1
SLAVE ADDRESS
ACK. BY
SLAVE
FRAME 2
COMMAND CODE
ACK. BY
SLAVE
SCL
(CONTINUED)
1
9
1
9
SDA
(CONTINUED)
D7
D6
D5
D4 D3 D2
FRAME 3
DATA BYTE
D1
D0
ACK. BY
SLAVE
D7
D6
D5
D4 D3 D2
FRAME N
DATA BYTE
D1
D0
ACK. BY
SLAVE
STOP
BY
MASTER
Figure 39. General SMBus Write Timing Diagram
Rev. C | Page 29 of 36
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