Datasheet

1089
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
Figure 43-32.Two-wire Serial Bus Timing
43.11.9 Embedded Flash Characteristics
The maximum operating frequency given in Table 43-57 is limited by the embedded Flash access time when the processor is
fetching code out of it. Table 43-57 gives the device maximum operating frequency depending on the field FWS of the MC_FMR
register. This field defines the number of wait states required to access the embedded Flash memory.
The embedded Flash is fully tested during production test. The Flash contents are not set to a known state prior to shipment.
Therefore, the Flash contents should be erased prior to programming an application.
Note: 1. Only the read operation is characterized between -40 and +105
°C.
The others are characterized between -40 and +85
°C.
Table 43-57. Embedded Flash Wait State
FWS Read Operations
Maximum Operating Frequency (MHz)
@105°C
VDDCORE Set at
1.08V and VDDIO
1.62V to 3.6V
VDDCORE Set at
1.08V and VDDIO
2.7V to 3.6V
VDDCORE Set at
1.2V and VDDIO
1.62V to 3.6V
VDDCORE Set at
1.2V and VDDIO
2.7V to 3.6V
0 1 cycle 16 20 17 17
1 2 cycles 33 40 34 34
2 3 cycles 50 60 52 52
3 4 cycles 67 80 69 69
4 5 cycles 84 100 87 87
5 6 cycles 100 — 104 104
t
SU;STA
t
LOW
t
HIGH
t
LOW
t
of
t
HD;STA
t
HD;DAT
t
SU;DAT
t
SU;STO
t
BUF
TWCK
TWD
t
r
Table 43-58. AC Flash Characteristics
(1)
Parameter Conditions Min Typ Max Units
Program Cycle Time
Erase Page Mode — 10 50 ms
Erase Block Mode (by 4 Kbyte) — 50 200 ms
Erase Sector Mode — 400 950 ms
Full Chip Erase
1 MByte
512 KByte
—
9
5.5
18
11
s
Data Retention Not Powered or Powered — 20 — years
Endurance
Write/Erase cycles per page, block or
sector @ 85°C 10k
— — cycles