71M6521DE Datasheet, PDF (92/101 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521DE/71M6521FE
Energy Meter IC
RAM AND FLASH MEMORY
TIMING SPECIFICATIONS
DATASHEET
JANUARY 2008
PARAMETER
CE DRAM wait states
CONDITION
CKMPU = 4.9MHz
CKMPU = 1.25MHz
CKMPU = 614kHz
MIN
TYP
MAX UNIT
5
Cycles
2
Cycles
1
Cycles
Flash Read Pulse Width
Flash write cycles
Flash data retention
Flash data retention
Flash byte writes between page or mass
erase operations
V3P3A=V3P3SYS=0
BROWNOUT MODE
-40°C to +85°C
25°C
85°C
30
20,000
100
10
100
ns
Cycles
Years
Years
2
Cycles
FLASH MEMORY TIMING
PARAMETER
Write Time per Byte
Page Erase (512 bytes)
Mass Erase
CONDITION
MIN
TYP
MAX UNIT
42
µs
20
ms
200
ms
EEPROM INTERFACE
PARAMETER
Write Clock frequency (I²C)
Write Clock frequency (3-wire)
CONDITION
CKMPU=4.9MHz, Using
interrupts
CKMPU=4.9MHz, “bit-
banging” DIO4/5
CKMPU=4.9MHz
MIN
TYP
MAX UNIT
78
kHz
150
kHz
500
kHz
RESET and V1
PARAMETER
Reset pulse fall time
Reset pulse width
V1 Response Time
CONDITION
+100mv overdrive
MIN
TYP
MAX UNIT
1
µs
5
µs
10
37
100
µs
RTC
PARAMETER
Range for date
CONDITION
MIN
TYP
MAX UNIT
2000
-
2255
year
FOOTNOTES
1_{This spec is guaranteed, has been verified in production samples, but is not measured in production.}
2_{This spec is guaranteed, has been verified in production samples, but is measured in production only at DC.}
3_{This spec is measured in production at the limits of the specified operating temperature.}
4_{This spec defines a nominal relationship rather than a measured parameter. Correct circuit operation is verified with}
other specs that use this nominal relationship as a reference.
Page: 92 of 101
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