Module bcr1

This register contains the control information of each memory bank, used for SRAMs, PSRAM and NOR Flash memories.

Structs

BCR1_SPEC

This register contains the control information of each memory bank, used for SRAMs, PSRAM and NOR Flash memories.

R

Register BCR1 reader

W

Register BCR1 writer

Type Aliases

ASYNCWAIT_R

Field ASYNCWAIT reader - Wait signal during asynchronous transfers This bit enables/disables the FMC to use the wait signal even during an asynchronous protocol.

ASYNCWAIT_W

Field ASYNCWAIT writer - Wait signal during asynchronous transfers This bit enables/disables the FMC to use the wait signal even during an asynchronous protocol.

BMAP_R

Field BMAP reader - FMC bank mapping These bits allows different to remap SDRAM bank2 or swap the FMC NOR/PSRAM and SDRAM banks.Refer to Table 10 for Note: The BMAP bits of the FMC_BCR2..4 registers are dont care. It is only enabled through the FMC_BCR1 register.

BMAP_W

Field BMAP writer - FMC bank mapping These bits allows different to remap SDRAM bank2 or swap the FMC NOR/PSRAM and SDRAM banks.Refer to Table 10 for Note: The BMAP bits of the FMC_BCR2..4 registers are dont care. It is only enabled through the FMC_BCR1 register.

BURSTEN_R

Field BURSTEN reader - Burst enable bit This bit enables/disables synchronous accesses during read operations. It is valid only for synchronous memories operating in Burst mode:

BURSTEN_W

Field BURSTEN writer - Burst enable bit This bit enables/disables synchronous accesses during read operations. It is valid only for synchronous memories operating in Burst mode:

CBURSTRW_R

Field CBURSTRW reader - Write burst enable For PSRAM (CRAM) operating in Burst mode, the bit enables synchronous accesses during write operations. The enable bit for synchronous read accesses is the BURSTEN bit in the FMC_BCRx register.

CBURSTRW_W

Field CBURSTRW writer - Write burst enable For PSRAM (CRAM) operating in Burst mode, the bit enables synchronous accesses during write operations. The enable bit for synchronous read accesses is the BURSTEN bit in the FMC_BCRx register.

CCLKEN_R

Field CCLKEN reader - Continuous Clock Enable This bit enables the FMC_CLK clock output to external memory devices. Note: The CCLKEN bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register. Bank 1 must be configured in synchronous mode to generate the FMC_CLK continuous clock. If CCLKEN bit is set, the FMC_CLK clock ratio is specified by CLKDIV value in the FMC_BTR1 register. CLKDIV in FMC_BWTR1 is dont care. If the synchronous mode is used and CCLKEN bit is set, the synchronous memories connected to other banks than Bank 1 are clocked by the same clock (the CLKDIV value in the FMC_BTR2..4 and FMC_BWTR2..4 registers for other banks has no effect.)

CCLKEN_W

Field CCLKEN writer - Continuous Clock Enable This bit enables the FMC_CLK clock output to external memory devices. Note: The CCLKEN bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register. Bank 1 must be configured in synchronous mode to generate the FMC_CLK continuous clock. If CCLKEN bit is set, the FMC_CLK clock ratio is specified by CLKDIV value in the FMC_BTR1 register. CLKDIV in FMC_BWTR1 is dont care. If the synchronous mode is used and CCLKEN bit is set, the synchronous memories connected to other banks than Bank 1 are clocked by the same clock (the CLKDIV value in the FMC_BTR2..4 and FMC_BWTR2..4 registers for other banks has no effect.)

CPSIZE_R

Field CPSIZE reader - CRAM Page Size These are used for Cellular RAM 1.5 which does not allow burst access to cross the address boundaries between pages. When these bits are configured, the FMC controller splits automatically the burst access when the memory page size is reached (refer to memory datasheet for page size). Other configuration: reserved.

CPSIZE_W

Field CPSIZE writer - CRAM Page Size These are used for Cellular RAM 1.5 which does not allow burst access to cross the address boundaries between pages. When these bits are configured, the FMC controller splits automatically the burst access when the memory page size is reached (refer to memory datasheet for page size). Other configuration: reserved.

EXTMOD_R

Field EXTMOD reader - Extended mode enable. This bit enables the FMC to program the write timings for asynchronous accesses inside the FMC_BWTR register, thus resulting in different timings for read and write operations. Note: When the extended mode is disabled, the FMC can operate in Mode1 or Mode2 as follows: ** Mode 1 is the default mode when the SRAM/PSRAM memory type is selected (MTYP =0x0 or 0x01) ** Mode 2 is the default mode when the NOR memory type is selected (MTYP = 0x10).

EXTMOD_W

Field EXTMOD writer - Extended mode enable. This bit enables the FMC to program the write timings for asynchronous accesses inside the FMC_BWTR register, thus resulting in different timings for read and write operations. Note: When the extended mode is disabled, the FMC can operate in Mode1 or Mode2 as follows: ** Mode 1 is the default mode when the SRAM/PSRAM memory type is selected (MTYP =0x0 or 0x01) ** Mode 2 is the default mode when the NOR memory type is selected (MTYP = 0x10).

FACCEN_R

Field FACCEN reader - Flash access enable This bit enables NOR Flash memory access operations.

FACCEN_W

Field FACCEN writer - Flash access enable This bit enables NOR Flash memory access operations.

FMCEN_R

Field FMCEN reader - FMC controller Enable This bit enables/disables the FMC controller. Note: The FMCEN bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register.

FMCEN_W

Field FMCEN writer - FMC controller Enable This bit enables/disables the FMC controller. Note: The FMCEN bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register.

MBKEN_R

Field MBKEN reader - Memory bank enable bit This bit enables the memory bank. After reset Bank1 is enabled, all others are disabled. Accessing a disabled bank causes an ERROR on AXI bus.

MBKEN_W

Field MBKEN writer - Memory bank enable bit This bit enables the memory bank. After reset Bank1 is enabled, all others are disabled. Accessing a disabled bank causes an ERROR on AXI bus.

MTYP_R

Field MTYP reader - Memory type These bits define the type of external memory attached to the corresponding memory bank:

MTYP_W

Field MTYP writer - Memory type These bits define the type of external memory attached to the corresponding memory bank:

MUXEN_R

Field MUXEN reader - Address/data multiplexing enable bit When this bit is set, the address and data values are multiplexed on the data bus, valid only with NOR and PSRAM memories:

MUXEN_W

Field MUXEN writer - Address/data multiplexing enable bit When this bit is set, the address and data values are multiplexed on the data bus, valid only with NOR and PSRAM memories:

MWID_R

Field MWID reader - Memory data bus width Defines the external memory device width, valid for all type of memories.

MWID_W

Field MWID writer - Memory data bus width Defines the external memory device width, valid for all type of memories.

WAITCFG_R

Field WAITCFG reader - Wait timing configuration The NWAIT signal indicates whether the data from the memory are valid or if a wait state must be inserted when accessing the memory in synchronous mode. This configuration bit determines if NWAIT is asserted by the memory one clock cycle before the wait state or during the wait state:

WAITCFG_W

Field WAITCFG writer - Wait timing configuration The NWAIT signal indicates whether the data from the memory are valid or if a wait state must be inserted when accessing the memory in synchronous mode. This configuration bit determines if NWAIT is asserted by the memory one clock cycle before the wait state or during the wait state:

WAITEN_R

Field WAITEN reader - Wait enable bit This bit enables/disables wait-state insertion via the NWAIT signal when accessing the memory in synchronous mode.

WAITEN_W

Field WAITEN writer - Wait enable bit This bit enables/disables wait-state insertion via the NWAIT signal when accessing the memory in synchronous mode.

WAITPOL_R

Field WAITPOL reader - Wait signal polarity bit This bit defines the polarity of the wait signal from memory used for either in synchronous or asynchronous mode:

WAITPOL_W

Field WAITPOL writer - Wait signal polarity bit This bit defines the polarity of the wait signal from memory used for either in synchronous or asynchronous mode:

WFDIS_R

Field WFDIS reader - Write FIFO Disable This bit disables the Write FIFO used by the FMC controller. Note: The WFDIS bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register.

WFDIS_W

Field WFDIS writer - Write FIFO Disable This bit disables the Write FIFO used by the FMC controller. Note: The WFDIS bit of the FMC_BCR2..4 registers is dont care. It is only enabled through the FMC_BCR1 register.

WREN_R

Field WREN reader - Write enable bit This bit indicates whether write operations are enabled/disabled in the bank by the FMC:

WREN_W

Field WREN writer - Write enable bit This bit indicates whether write operations are enabled/disabled in the bank by the FMC: