Datasheet

910
32142D–06/2013
ATUC64/128/256L3/4U
35.6.6 32kHz RC Oscillator (RC32K) Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
35.6.7 System RC Oscillator (RCSYS) Characteristics
35.7 Flash Characteristics
Table 35-18 gives the device maximum operating frequency depending on the number of flash
wait states and the flash read mode. The FSW bit in the FLASHCDW FSR register controls the
number of wait states used when accessing the flash memory.
Table 35-16. 32kHz RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
OUT
Output frequency
(1)
20 32 44 kHz
I
RC32K
Current consumption 0.7 µA
t
STARTUP
Startup time
(1)
100 µs
Table 35-17. System RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
OUT
Output frequency Calibrated at 85C 111.6 115 118.4 kHz
Table 35-18. Maximum Operating Frequency
Flash Wait States Read Mode Maximum Operating Frequency
1
High speed read mode
50MHz
0 25MHz
1
Normal read mode
30MHz
0 15MHz
Table 35-19. Flash Characteristics
Symbol Parameter Conditions Min Typ Max Unit
t
FPP
Page programming time
f
CLK_HSB
= 50MHz
5
ms
t
FPE
Page erase time 5
t
FFP
Fuse programming time 1
t
FEA
Full chip erase time (EA) 6
t
FCE
JTAG chip erase time (CHIP_ERASE) f
CLK_HSB
= 115kHz 310