71M6543GH MAXIM [Maxim Integrated Products], 71M6543GH Datasheet - Page 117
71M6543GH
Manufacturer Part Number
71M6543GH
Description
Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
1.71M6543GH.pdf
(157 pages)
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v1.2
Name
VSTAT[2:0]
WAKE_ARM
WAKE_TMR
WD_RST
WF_DIO4
WF_DIO52
WF_DIO55
WF_TMR
WF_PB
WF_RX
WF_CSTART
WF_RST
WF_RSTBIT
WF_OVF
WF_ERST
WF_BADVDD
SFR F9[2:0]
Location Rst Wk Dir
2880[7:0]
28B2[5]
28B4[7]
28B1[2]
28B1[1]
28B1[0]
28B1[5]
28B1[3]
28B1[4]
28B0[7]
28B0[6]
28B0[5]
28B0[4]
28B0[3]
28B0[2]
–
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
–
–
–
0
–
–
–
–
–
–
–
© 2008–2011 Teridian Semiconductor Corporation
R/W
R/W
W
R
R
R
R
R
R
R
R
Description
This word describes the source of power and the status of the VDD.
Arms the WAKE timer and loads it with WAKE_TMR[7:0]. When SLEEP or LCD mode
is asserted by the MPU, the WAKE timer becomes active.
Timer duration is WAKE_TMR+1 seconds.
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.
DIO4 wake flag bit. If DIO4 is configured to wake the part, this bit is set whenever the
de-bounced version of DIO4 rises. It is held in reset if DI04 is not configured for
wakeup.
DIO52 wake flag bit. If DIO52 is configured to wake the part, this bit is set whenever the
de-bounced version of DIO52 rises. It is held in reset if DI052 is not configured for wakeup.
DIO55 wake flag bit. If DIO55 is configured to wake the part, this bit is set whenever the
de-bounced version of DIO55 rises. It is held in reset if DI055 is not configured for wakeup.
Indicates that the wake timer caused the part to wake up.
Indicates that the PB caused the part to wake.
Indicates that RX caused the part to wake.
Indicates that the Reset pin, Reset bit, ERST pin, Watchdog timer, the cold start detector,
or bad VBAT caused the part to reset.
VSTAT[2:0] Description
000
001
010
011
101
System Power OK. V3P3A>3.0v. Analog modules are functional and
accurate. [V3AOK,V3OK]=11
System Power Low. 2.8v<V3P3A<3.0v. Analog modules not accurate.
Switch over to battery power is imminent. [V3AOK,V3OK]=01
Battery power and VDD OK. VDD>2.25v. Full digital functionality.
[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=11
Battery power and VDD>2.0. Flash writes are inhibited. If the
TRIMVDD[5] fuse is blown, PLL_FAST is cleared.
[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=01
Battery power and VDD<2.0. When VSTAT=101, processor is nearly
out of voltage. Processor failure is imminent.
[V3AOK,V3OK]=00, [VDDOK,VDDgt2]=00
71M6543F/H and 71M6543G/GH Data Sheet
117
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