CYBLE-224116-01
Document Number: 002-12524 Rev. *D
Page 29 of 47
Memory
System Resources
Power-on-Reset (POR)
Note
11. It can take as much as 20 ms to write to flash. During this time, the device should not be reset, or flash operations will be interrupted and cannot be relied on to have
completed. Reset sources include the XRES pin, software resets, CPU lockup states and privilege violations, improper power supply levels, and watchdogs. Make
certain that these are not inadvertently activated.
Table 43. Flash DC Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
V
PE
Erase and program voltage
1.71
–
5.5
V
–
T
WS48
Number of Wait states at 32–48 MHz
2
–
–
CPU execution from flash
T
WS32
Number of Wait states at 16–32 MHz
1
–
–
CPU execution from flash
T
WS16
Number of Wait states for 0–16 MHz
0
–
–
CPU execution from flash
Table 44. Flash AC Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
T
ROWWRITE
[11]
Row (block) write time (erase and program)
–
–
20
ms
Row (block) = 256 bytes
T
ROWERASE
[11]
Row erase time
–
–
13
ms
–
T
ROWPROGRAM
[11]
Row program time after erase
–
–
7
ms
–
T
BULKERASE
[11]
Bulk erase time (256 KB)
–
–
35
ms
–
T
DEVPROG
[11]
Total device program time
–
–
25
seconds –
F
END
Flash endurance
100 K
–
–
cycles –
F
RET
Flash retention. T
A
55 °C, 100 K P/E cycles
20
–
–
years –
F
RET2
Flash retention. T
A
85 °C, 10 K P/E cycles
10
–
–
years For 55 °C
T
A
85 °C
F
RET3
Flash retention. T
A
105 °C, 10 K P/E cycles
3
–
–
years For T
A
85 °C
Table 45. POR DC Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
V
RISEIPOR
Rising trip voltage
0.80
–
1.45
V
–
V
FALLIPOR
Falling trip voltage
0.75
–
1.40
V
–
V
IPORHYST
Hysteresis 15
–
200
mV
–
Table 46. POR AC Specifications
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
T
PPOR_TR
Precision power-on reset (PPOR) response
time in Active and Sleep modes
–
–
1
µs
–
Table 47. Brown-Out Detect
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
V
FALLPPOR
BOD trip voltage in Active and Sleep modes
1.64
–
–
V
–
V
FALLDPSLP
BOD trip voltage in Deep Sleep
1.4
–
–
V
–
Table 48. Hibernate Reset
Parameter
Description
Min
Typ
Max
Units
Details/Conditions
V
HBRTRIP
BOD trip voltage in Hibernate
1.1
–
–
V
–
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