参数资料
| 型号： | EVAL-ADM1176EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADM1176 |
| 产品培训模块： | Hot Swap Design |
| 标准包装： | 1 |
| 主要目的： | 电源管理，热交换控制器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADM1176 |
| 主要属性： | 热交换控制器，数字功率监控器，高端 MOSFET 驱动器 |
| 次要属性： | SMBus，I2C，3.15 V ~ 16.5 V 电源 |
| 已供物品： | 板，线缆，样品 IC |
| 相关产品： | ADM1176-2ARMZ-R7DKR-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP ADM1176-1ARMZ-R7DKR-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP ADM1176-2ARMZ-R7CT-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP ADM1176-1ARMZ-R7CT-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP ADM1176-2ARMZ-R7TR-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP ADM1176-1ARMZ-R7TR-ND - IC CTRLR HOTSWAP 16.5V 10-MSOP |
ADM1176
WRITE AND READ OPERATIONS
The I 2 C specification defines several protocols for different types of
read and write operations. The operations used in the ADM1176
are discussed in this section. Table 6 shows the abbreviations
Table 6. I 2 C Abbreviations
Data Sheet
WRITE COMMAND BYTE
In the write command byte operation, the master device sends
a command byte to the slave device, as follows:
1. The master device asserts a start condition on SDA.
2. The master sends the 7-bit slave address, followed by the
Abbreviation
Condition
write bit (low).
S
P
R
W
A
N
Start
Stop
Read
Write
Acknowledge
No acknowledge
3.
4.
5.
The addressed slave device asserts an acknowledge on SDA.
The master sends the command byte. The command byte
is identified by an MSB = 0. An MSB = 1 indicates an
Byte section).
The slave asserts an acknowledge on SDA.
QUICK COMMAND
6.
The master asserts a stop condition on SDA to end the
transaction.
The quick command operation allows the master to check if the
1
2
3
4
5 6
S ADDRESS W A
slave is present on the bus, as follows:
SLAVE
COMMAND
BYTE
A P
1.
2.
3.
4.
The master device asserts a start condition on SDA.
The master sends the 7-bit slave address, followed by the
write bit (low).
The addressed slave device asserts an acknowledge on SDA.
The master asserts a stop condition on SDA to end the
transaction.
Figure 36. Write Command Byte
The seven LSBs of the command byte are used to configure and
control the ADM1176. Table 7 provides details of the function
of each bit.
1
2
3 4
S ADDRESS W A P
SLAVE
Figure 35. Quick Command
Table 7. Command Byte Operations
Bit
C0
Default
0
Name
V_CONT
Function
LSB, set to convert voltage continuously. If readback is attempted before the first conversion is complete, the
ADM1176 asserts an acknowledge and returns all 0s in the returned data.
C1
0
V_ONCE
Set to convert voltage once. Self-clears. I 2 C asserts a no acknowledge on attempted reads until the ADC
conversion is complete.
C2
0
I_CONT
Set to convert current continuously. If readback is attempted before the first conversion is complete, the
ADM1176 asserts an acknowledge and returns all 0s in the returned data.
C3
0
I_ONCE
Set to convert current once. Self-clears. I 2 C asserts a no acknowledge on attempted reads until the ADC
conversion is complete.
C4
0
VRANGE
Selects different internal attenuation resistor networks for voltage readback. A 0 in C4 selects a 14:1 voltage
divider. A 1 in C4 selects a 7:2 voltage divider. With an ADC full scale of 1.902 V, the voltage at the VCC pin for
an ADC full-scale result is 26.35 V for VRANGE = 0 and 6.65 V for VRANGE = 1.
C5
C6
0
0
N/A
STATUS_RD
Unused.
Status read. When this bit is set, the data byte readback from the ADM1176 is the status byte. This contains
the status of the device alerts. See Table 15 for full details of the status byte.
Rev. C | Page 18 of 24
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