STMicroelectronics STM32F407 User Manual

DocID018909 Rev 11 1643/1731
RM0090 Flexible memory controller (FMC)
1669
31302928272625242322212019181716151413121110987654321 0
Reserved
ECCPS[2:0]
TAR[3:0]
TCLR[3:0]
Reserved
ECCEN
PWID[1:0]
PTYP
PBKEN
PWAITEN
Reserved
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:20 Reserved, must be kept at reset value
Bits 19:17 ECCPS[2:0]: ECC page size.
Defines the page size for the extended ECC:
000: 256 byte
001: 512 byte
010: 1024 byte
011: 2048 byte
100: 4096 byte
101: 8192 byte
Bits 16:13 TAR[3:0]: ALE to RE delay.
Sets time from ALE low to RE low in number of AHB clock cycles (HCLK).
Time is: t_ar = (TAR + SET + 2) × THCLK where THCLK is the HCLK clock period
0000: 1 HCLK cycle (default)
1111: 16 HCLK cycles
Note: SET is MEMSET or ATTSET according to the addressed space.
Bits 12:9 TCLR[3:0]: CLE to RE delay.
Sets time from CLE low to RE low in number of AHB clock cycles (HCLK).
Time is t_clr = (TCLR + SET + 2) × THCLK where THCLK is the HCLK clock period
0000: 1 HCLK cycle (default)
1111: 16 HCLK cycles
Note: SET is MEMSET or ATTSET according to the addressed space.
Bits 8:7 Reserved, must be kept at reset value
Bit 6 ECCEN: ECC computation logic enable bit
0: ECC logic is disabled and reset (default after reset),
1: ECC logic is enabled.
Bits 5:4 PWID[1:0]: Data bus width.
Defines the external memory device width.
00: 8 bits
01: 16 bits (default after reset). This value is mandatory for PC Cards.
10: reserved, do not use
11: reserved, do not use
Bit 3 PTYP: Memory type.
Defines the type of device attached to the corresponding memory bank:
0: PC Card, CompactFlash, CF+ or PCMCIA
1: NAND Flash (default after reset)

STMicroelectronics STM32F407 Specifications

General

Brand	STMicroelectronics
Model	STM32F407
Category	Controller
Language	English