78M6618 Data Sheet DS_6618_005
22 Rev. 1.4
2.5 Timing Specifications
2.5.1 Flash Memory
Table 20: Flash Memory Timing Specifications
Parameter Condition Min Typ Max Unit
Flash write cycles -40°C to +85°C 20,000 Cycles
Flash data retention 25°C 100 Years
Flash data retention 85°C 10 Years
Flash byte write operations between
page or mass erase operations
2 Cycles
Write Time per Byte 42
µs
Page Erase (1024 bytes) 20 ms
Mass Erase 200 ms
2.5.2 EEPROM Interface
Table 21: EEPROM Interface Timing
Parameter Condition Min Typ Max Unit
Write Clock frequency (I
2
C)
CKMPU = 4.9152 MHz,
Using interrupts
78 kHz
CKMPU = 4.9152 MHz,
bit-banging DIO4/5
150 kHz
Write Clock frequency (3-wire) CKMPU = 4.9152 MHz 500 kHz
2.5.3 RESET
Table 22: RESET Timing
Parameter Condition Min Typ Max Unit
Reset pulse width 5
µs
Reset pulse fall time 1
1
µs
1
Guaranteed by design; not production tested.
2.5.4 RTC
Table 23: RTC Range
Parameter Condition Min Typ Max Unit
Range for date 2000 2255 year
