AT91SAM7S64-AI Datasheet, PDF (103/482 Pages) ATMEL Corporation – AT91 ARM THUMB BASED MICROCONTROLLERS

AT91SAM7S64 Preliminary
MC Flash Mode Register
Register Name:
Access Type:
Offset:
MC_FMR
Read/Write
0x60
31
30
29
28
27
–
–
–
–
–
23
22
21
20
19
FMCN
15
14
13
12
11
–
–
–
–
–
7
6
5
4
3
NEBP
–
–
–
PROGE
• FRDY: Flash Ready Interrupt Enable
0 = Flash Ready does not generate an interrupt.
1 = Flash Ready generates an interrupt.
• LOCKE: Lock Error Interrupt Enable
0 = Lock Error does not generate an interrupt.
1 = Lock Error generates an interrupt.
• PROGE: Programming Error Interrupt Enable
0 = Programming Error does not generate an interrupt.
1 = Programming Error generates an interrupt.
• NEBP: No Erase Before Programming
0 = A page erase is performed before programming.
1 = No erase is performed before programming.
• FWS: Flash Wait State
This field defines the number of wait states for read and write operations:
FWS
0
1
2
3
Read Operations
1 cycle
2 cycles
3 cycles
4 cycles
26
–
18
10
–
2
LOCKE
25
24
–
–
17
16
9
8
FWS
1
0
–
FRDY
Write Operations
2 cycles
3 cycles
4 cycles
4 cycles
• FMCN: Flash Microsecond Cycle Number
This field defines the number of Master Clock cycles in 1 microsecond.
Warning: The value 0 is only allowed for a master clock period superior to 30 microseconds.
Warning: In order to guarantee valid operations on the Flash memory, the field Flash Microsecond Cycle Number (FMCN)
must be correctly programmed.
6070A–ATARM–28-Oct-04
103