1.

A bus error event occurred, and

2.

the "physical" condition for an Attention Request is met

(i.e., the bus is inactive), and

3.

At the first time 2. is met after 1 occurred, there has not

been a Bus Reset.

All devices (master or slave) must monitor the bus for an

Attention Request signal. The following notes clarify the

intended system operation that uses the Attention Request

Indication.

•

Masters are expected to use the attention request as a

trigger to read results from the LM95010. This is done in

a sequence that covers all LM95010s. This sequence is

referred to as "master sensor read sequence".

•

After an Attention Request is sent by an LM95010 until

after the next read from the Device Status register the

LM95010 does not send Attention Requests for a function

event since it is guaranteed that the master will read the

Status register as part of the master sensor read se-

quence. Note that the LM95010 will send an attention for

BER, regardless of the Status register read, to help the

master with any error recovery operations and prevent

deadlocks.

•

A master must record the Attention Request event. It

must then scan all slave devices in the system by reading

their Device Status register and must handle any pending

event in them before it may assume that there are no

more events to handle.

Note: there is no indication of which slave has sent the

request. The requirement that multiple requests are not sent

allows the master to know within one scan of register reads

that there are no more pending events.

1.3.6 Fixed Number Setting

The LM95010 device number is defined by strapping of the

ADD0 and ADD1 pins. The LM95010 will wake (after Device

Reset) with the Device Number field of the Device Number

register set to the address as designated in Section 1.1.1

Device Number. It is the responsibility of the system de-

signer to avoid having two devices with the same Device

Number on the bus.

Devices should be detected by the master by a read opera-

tion of the Device Number register. The read returns "000" if

there is no device at that address on the bus (the EP bit must

be ignored).

2.0 Register Set

2.1 REGISTER SET SUMMARY

Reg

Add

Register

Name

R/

W

P

O

R

Val

Bit

15

MSb

Bit

14

Bit

13

Bit

12

Bit

11

Bit

10

Bit

9

Bit

8

Bit

7

Bit

6

Bit

5

Bit

4

Bit

3

Bit

2

Bit

1

Bit

0

LSb

000 000

Device

Number

R

*

Not Available

Reserved

See Table 1

00000

000 001 Manufacturer

ID

R 100Bh

0001000000001011

000 010 Device ID

R

21h

RevID

Device ID

0000000000100001

000 011 Capabilities

Fixed

R

1h

Reserved

Function 1

0000000000000001

000 100 Device

Status

R

0h

Not Available

BER

0

0 ERF1

0

0

0

SF1

000 101 Device

Control

R/

W

0h

Reserved

EnF1 Res Low

Pwr

Shut

down

Reset

00000000000

0

001 000 Temperature

Capabilities

R 014Ah

Reserved

Int

Sens

Rout

Size

Sign

10Bits

0.25˚C

Resolution

0000000101001010

001 001 Temperature

Data

Readout

R

MSb

Sign

64˚C 32˚C 16˚C 8˚C

4˚C

2˚C

1˚C

0.5

˚C

LSb

0.25

˚C

Reserved

000000

001 010 Temperature

Control

R/

W

0h

Reserved

EN0 ATE

00000000000000

001 011

-011 111

Reserved

R

Undefined

100 000 Conversion

Rate

R/

W

2h

Not Available

000000

Conversion

Rate

100 001

- 111 111

Undefined

Registers

R

Undefined

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