SAM3XA EFC0

Embedded Flash Controller (EFC0) User Interface

Registers

Register Mapping

Address	Register	Name	Access	Reset
0x400E0A00	EEFC Flash Mode Register	EFC0_FMR	read-write	0x00000000
0x400E0A04	EEFC Flash Command Register	EFC0_FCR	write-only	-
0x400E0A08	EEFC Flash Status Register	EFC0_FSR	read-only	0x00000001
0x400E0A0C	EEFC Flash Result Register	EFC0_FRR	read-only	0x00000000

Register Fields

EFC0 EEFC Flash Mode Register

Name: EFC0_FMR

Access: read-write

Address: 0x400E0A00

31	30	29	28	27	26	25	24
-	-	-	-	-	-	-	FAM
23	22	21	20	19	18	17	16
-	-	-	-	-	-	-	SCOD
15	14	13	12	11	10	9	8
-	-	-	-	FWS
7	6	5	4	3	2	1	0
-	-	-	-	-	-	-	FRDY

• FRDY: Ready Interrupt Enable

  Value	Name	Description
  0	-	Flash Ready does not generate an interrupt.
  1	-	Flash Ready (to accept a new command) generates an interrupt.

• FWS: Flash Wait State

-

• SCOD: Sequential Code Optimization Disable

  Value	Name	Description
  0	-	The sequential code optimization is enabled.
  1	-	The sequential code optimization is disabled.

• FAM: Flash Access Mode

  Value	Name	Description
  0	-	128-bit access in read Mode only, to enhance access speed.
  1	-	64-bit access in read Mode only, to enhance power consumption.

EFC0 EEFC Flash Command Register

Name: EFC0_FCR

Access: write-only

Address: 0x400E0A04

31	30	29	28	27	26	25	24
FKEY
23	22	21	20	19	18	17	16
FARG
15	14	13	12	11	10	9	8
FARG
7	6	5	4	3	2	1	0
FCMD

• FCMD: Flash Command

-

• FARG: Flash Command Argument

-

• FKEY: Flash Writing Protection Key

-

EFC0 EEFC Flash Status Register

Name: EFC0_FSR

Access: read-only

Address: 0x400E0A08

31	30	29	28	27	26	25	24
-	-	-	-	-	-	-	-
23	22	21	20	19	18	17	16
-	-	-	-	-	-	-	-
15	14	13	12	11	10	9	8
-	-	-	-	-	-	-	-
7	6	5	4	3	2	1	0
-	-	-	-	-	FLOCKE	FCMDE	FRDY

• FRDY: Flash Ready Status

  Value	Name	Description
  0	-	The Enhanced Embedded Flash Controller (EEFC) is busy.
  1	-	The Enhanced Embedded Flash Controller (EEFC) is ready to start a new command.

• FCMDE: Flash Command Error Status

  Value	Name	Description
  0	-	No invalid commands and no bad keywords were written in the Flash Mode Register EEFC_FMR.
  1	-	An invalid command and/or a bad keyword was/were written in the Flash Mode Register EEFC_FMR.

• FLOCKE: Flash Lock Error Status

  Value	Name	Description
  0	-	No programming/erase of at least one locked region has happened since the last read of EEFC_FSR.
  1	-	Programming/erase of at least one locked region has happened since the last read of EEFC_FSR.

EFC0 EEFC Flash Result Register

Name: EFC0_FRR

Access: read-only

Address: 0x400E0A0C

31	30	29	28	27	26	25	24
FVALUE
23	22	21	20	19	18	17	16
FVALUE
15	14	13	12	11	10	9	8
FVALUE
7	6	5	4	3	2	1	0
FVALUE

• FVALUE: Flash Result Value

-