71M6521BE Datasheet, PDF (55/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
System
Power
(V3P3SYS)
V1_OK
Battery
Current
MPU Mode BROWNOUT
Transition
MISSION
300nA
WAKE
13..14 CK
cycles
MPU Clock
Source
Xtal
PLL
(4.2MHz/MUX_DIV)
PLL_OK
2048...4096
CK32 cycles
time
Figure 22: Transition from BROWNOUT to MISSION Mode when System Power Returns
V3P3SYS
and VBAT
V1_OK
Battery
Current
MPU Mode
BROWN-
OUT
MISSION
300nA
MPU Clock
Source
Xtal
PLL
(4.2MHz)
WAKE
14.5 CK32
cycles
PLL_OK
4096 CK32
cycles
Internal
1024 CK32
RESETZ
cycles
time
Figure 23: Power-Up Timing with V3P3SYS and VBAT tied together
V1.0
© 2005-2008 TERIDIAN Semiconductor Corporation
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