ADM1032ARMZ-2R 参数 Datasheet PDF下载

型号：	ADM1032ARMZ-2R
PDF下载：	下载PDF文件查看货源
内容描述：	1C远程和本地系统温度监控器支持SMBus报警 [1C Remote and Local System Temperature Monitor Supports SMBus Alert]
分类和应用：	模拟IC信号电路光电二极管监控PC
文件页数/大小：	18 页 / 237 K
品牌：	ONSEMI [ ON SEMICONDUCTOR ]

ADM1032

SCLK

SDATA

START BY

MASTER

R/W

ACK. BY

ADM1032

ACK. BY

ADM1032

FRAME 1

SERIAL BUS ADDRESS BYTE

SCLK (CONTINUED)

FRAME 2

ADDRESS POINTER REGISTER BYTE

SDATA (CONTINUED)

ACK. BY

ADM1032

STOP BY

MASTER

FRAME 3

DATA BYTE

Figure 13. Writing a Register Address to the Address Pointer Register,

then Writing Data to the Selected Register

SCLK

SDATA

START BY

MASTER

R/W

ACK. BY

ADM1032

ACK. BY

ADM1032

STOP BY

MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

ADDRESS POINTER REGISTER BYTE

Figure 14. Writing to the Address Pointer Register Only

SCLK

SDATA

START BY

MASTER

R/W

ACK. BY

ADM1032

ACK. BY

ADM1032

STOP BY

MASTER

FRAME 1

SERIAL BUS ADDRESS BYTE

FRAME 2

DATA BYTE FROM ADM1032

Figure 15. Reading Data from a Previously Selected Register

ALERT Output

MASTER

RECEIVES

SMBALERT

START

ALERT RESPONSE

ADDRESS

MASTER SENDS

ARA AND READ

COMMAND

RD ACK

DEVICE

ADDRESS

DEVICE SENDS

ITS ADDRESS

STOP

ACK

The ALERT output goes low whenever an out-of-limit

measurement is detected, or if the remote temperature sensor

is open-circuit. It is an open drain and requires a pullup to

. Several ALERT outputs can be wire-OR’ed together

so that the common line goes low if one or more of the

ALERT outputs goes low.

The ALERT output can be used as an interrupt signal to a

processor, or it can be used as an SMBALERT. Slave devices

on the SMBus can not normally signal to the master that they

want to talk, but the SMBALERT function allows them to do

so.

One or more ALERT outputs can be connected to a

common SMBALERT line connected to the master. When

the SMBALERT line is pulled low by one of the devices, the

following procedure occurs (see Figure 16).

Figure 16. Use of SMBALERT

1. SMBALERT is pulled low.

2. Master initiates a read operation and sends the

alert response address (ARA = 0001 100). This is

a general call address that must not be used as a

specific device address.

3. The device whose ALERT output is low responds

to the alert response address and the master reads

its device address. Since the device address is

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