MIC3002 datasheet(21/65 Pages) MICREL

21 / 65 page

Micrel, Inc.

MIC3002

July 2007

M9999-073107-B

hbwhelp@micrel.com or (408) 955-1690

Serial Address A2h

Byte

Bit

Default Value

Description

Masking bit for Temp High Warning interrupt source

Masking bit for Temp Low Warning interrupt source

Masking bit for Voltage High Warning interrupt source

Masking bit for Voltage Low Warning interrupt source

Masking bit for Bias High Warning interrupt source

Masking bit for Bias Low Warning interrupt source

Masking bit for TX Power High Warning interrupt source

250

Masking bit for TX Power Low Warning interrupt source

Masking bit for RX Power High Warning interrupt source

Masking bit for RX Power Low Warning interrupt source

Reserved

251

Reserved

Table 9. Warnings Interrupt Sources Masking Bits

Alarms and Warnings as TXFAULT Source

Alarms and warnings are not sources for TXFAULT with

the default setting. To set alarms as a TXFAULT source

set OEMCFG4 bit 6 to 1. To set warnings as a

TXFAULT, source set OEMCFG4 bit 7 to 1. The alarms

and warnings TXFAULT sources can be masked

individually in the same way shown in Tables 7 and 8.

Alarms and Warnings Latch

Alarms and warnings are latched with the default setting,

i.e., the flags once asserted remain ON until the register

is read or TXDSABLE is toggled. If OEMCFG4 bit 5 is

set to 1, the warnings are not latched and will be set and

reset with the warning condition. Reading the register or

toggling TXDISABLE will clear the flag. If OEMCFG4 bit

4 is set to 1, the alarms are not latched and will be set

and reset with the alarm condition. Reading the register

or toggling TXDISABLE will clear the flag.

SMBus Multipart Support

If more than one MIC3002 device shares the same serial

interface and multipart mode is selected on them

(OEMCFG5 bit 3 = 1), then pin 7 and pin 20 become

SMBus address bits 3 and 4 respectively. Therefore, the

parts should have a different setting on those pins to

create four address combinations based upon pin 7 and

pin 20 state, (00, 01, 10, 11) where 0 is a pull down to

GND and 1 is a pull up to VCC. The parts come from the

factory with the same address (A0) and multipart mode

OFF (OEMCFG5 bit 3 = 0). After power up, write 1 to

OEMCFG5 bit 3 to turn ON multipart mode, which is

done to all parts at the same time since they all respond

to serial address A0 at this point. With multipart mode

ON, the parts have different addresses based on the

states of pins 7 and 20. Another option is to access each

part individually, set their single mode address in

OEMCFG2 bits [4-7] to different values and then turn

OFF multipart mode to return to normal mode where the

parts have new different address.

MIC3002 データシート(PDF) 21 Page - Micrel Semiconductor

MIC3002 データシート(HTML) 21 Page - Micrel Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

データシートダウンロード