71M6545 datasheet(97/133 Pages) MAXIM

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71M6545/71M6545H Data Sheet

Name

Location

Rst Wk Dir Description

TEMP_START

28B4[6]

0 R/W

When TEMP_PER = 0 automatic temperature measurements are disabled, and

TEMP_START may be set by the MPU to initiate a one-shot temperature

measurement. TEMP_START is ignored in SLP mode. Hardware clears TEMP_START

when the temperature measurement is complete.

TMUX[5:0]

2502[5:0]

–

– R/W Selects one of 32 signals for TMUXOUT. See 2.5.14 for details.

TMUX2[4:0]

2503[4:0]

–

– R/W Selects one of 32 signals for TMUX2OUT. See 2.5.14 for details.

TMUXR2[2:0]

TMUXR4[2:0]

TMUXR6[2:0]

270A[2:0]

270A[6:4]

2709[2:0]

000 000 R/W The TMUX setting for the remote isolated sensors (71M6xx3).

VERSION[7:0]

2706[7:0]

–

The silicon version index. This word may be read by firmware to determine the silicon

version.

VERSION[7:0] Silicon Version

0001 0001

A01

0001 0011

A03

0001 0011

B01

VREF_CAL

2704[7]

0 R/W Brings the ADC reference voltage out to the VREF pin. This feature is disabled when

VREF_DIS=1.

VREF_DIS

2704[6]

1 R/W Disables the internal ADC voltage reference.

VSTAT[2:0]

SFR F9[2:0]

–

This word describes the source of power and the status of the VDD.

VSTAT[2:0] Description

000

System Power OK. V3P3A>3.0v. Analog modules are functional and

accurate. [V3AOK,V3OK]=11

001

System Power Low. 2.8v<V3P3A<3.0v. Analog modules not

accurate. [V3AOK,V3OK]=01

010

VDD OK. VDD>2.25v. Full digital functionality.

[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=11

011

VDD>2.0. Flash writes are inhibited. If the TRIMVDD[5] fuse is

blown, PLL_FAST is cleared.

[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=01

101

VDD<2.0. When VSTAT=101, processor is nearly out of voltage.

Processor failure is imminent.

[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=00

WAKE_TMR

2880[7:0]

– R/W Timer duration is WAKE_TMR+1 seconds.

WD_RST

28B4[7]

Reset the WD timer. The WD is reset when a 1 is written to this bit. Writing a one

clears and restarts the watch dog timer.

71M6545 Datasheet(PDF) 97 Page - Maxim Integrated Products

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