71m6521be Maxim Integrated Products, Inc., 71m6521be Datasheet - Page 75

• Manufacturer Part Number: 71m6521be
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

TMUX[4:0]
VERSION[7:0]
VREF_CAL
VREF_DIS
WAKE_ARM
WAKE_PRD
WAKE_RES
WD_RST
WD_OVF
V1.0
20AA[4:0]
SFRE8[7]
20A9[2:0]
20A9[7]
20A9[3]
2004[7]
2004[3]
2002[2]
2006
001
--
2
0
0
0
0
0
0
© 2005-2008 TERIDIAN Semiconductor Corporation
--
--
--
--
--
0
1
0
0
R/W
R/W
R/W
R/W
R/W
R/W
W
W
R
Selects one of 32 signals for TMUXOUT.
The version index. This word may be read by firmware to determine
the silicon version.
Brings VREF to VREF pad. This feature is disabled when
VREF_DIS=1.
Disables the internal voltage reference.
Arm the autowake timer. Writing a 1 to this bit arms the autowake
timer and presets it with the values presently in WAKE_PRD and
WAKE_RES. The autowake timer is reset and disarmed whenever
the processor is in MISSION mode or BROWNOUT mode. The
timer must be armed at least three crystal clock cycles before the
SLEEP or LCD-ONLY mode is commanded.
Sleep time. Time=WAKE_PRD[2:0]*WAKE_RES. Default=001.
Maximum value is 7.
Resolution of WAKE timer: 1 – 1 minute, 0 – 2.5 seconds.
WD timer bit: Possible operations to this bit are:
Read: Gets the status of the flag IE_PLLFALL
Write 0: Clears the flag
Write 1:.Resets the WDT
The WD overflow status bit. This bit is set when the WD timer
overflows. It is powered by the nonvolatile supply and at bootup will
indicate if the part is recovering from a WD overflow or a power fault.
This bit should be cleared by the MPU on bootup. It is also
automatically cleared when RESET is high.
[4:0]
0x00
0x02
0x04
0x06
0x08
0x0A
0x14
0x16 –
0x17
0x19
0x1B
0x1D
0x1F
VERSION[7:0]
0000 0110
Selected Signal
DGND (analog)
Reserved
Reserved
VBIAS (analog)
Reserved
Reserved
RTM (Real time
output from CE)
Not used
MUX_SYNC
CK_MPU
Reserved
XFER_BUSY
Silicon Version
A06
Energy Meter IC
[4:0]
0x01
0x03
0x05
0x07
0x09
0x0B
-0x13
0x15
0x18
0x1A
0x1C
0x1E
71M6521BE
DATA SHEET
Selected Signal
Reserved
Reserved
Reserved
Output AND V1LT3)
terface, after optional
inversion
Reserved
Not used
Reserved
WDTR_E, comparator 1
RXD, from optical in-
CK_10M
Reserved
CE_BUSY
JANUARY 2008
Page: 75 of 97