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RM0008
Flexible static memory controller (FSMC)
Bit 2 PBKEN: PC Card/NAND Flash memory bank enable bit.
Enables the memory bank. Accessing a disabled memory bank causes an ERROR on AHB
bus
0: Corresponding memory bank is disabled (default after reset)
1: Corresponding memory bank is enabled
Bit 1 PWAITEN: Wait feature enable bit.
Enables the Wait feature for the PC Card/NAND Flash memory bank:
0: disabled
1: enabled
Note: For a PC Card, when the wait feature is enabled, the MEMWAITx/ATTWAITx/IOWAITx
bits must be programmed to a value higher than t v(IORDY-NOE) /T HCLK + 4, where
t v(IORDY-NOE) is the maximum time taken by NWAIT to go low once NOE is low.
Bit 0
Reserved.
FIFO status and interrupt register 2..4 (FSMC_SR2..4)
Address offset: 0xA000 0000 + 0x44 + 0x20 * (x-1), x = 2..4
Reset value: 0x0000 0040
This register contains information about FIFO status and interrupt. The FSMC has a FIFO
that is used when writing to memories to store up to16 words of data from the AHB.
This is used to quickly write to the AHB and free it for transactions to peripherals other than
the FSMC, while the FSMC is draining its FIFO into the memory. This register has one of its
bits that indicates the status of the FIFO, for ECC purposes.
The ECC is calculated while the data are written to the memory, so in order to read the
correct ECC the software must wait until the FIFO is empty.
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
r
rw
rw
rw
rw
rw
rw
Bit 6 FEMPT: FIFO empty.
Read-only bit that provides the status of the FIFO
0: FIFO not empty
1: FIFO empty
Bit 5 IFEN: Interrupt falling edge detection enable bit
0: Interrupt falling edge detection request disabled
1: Interrupt falling edge detection request enabled
Bit 4 ILEN: Interrupt high-level detection enable bit
0: Interrupt high-level detection request disabled
1: Interrupt high-level detection request enabled
Bit 3 IREN: Interrupt rising edge detection enable bit
0: Interrupt rising edge detection request disabled
1: Interrupt rising edge detection request enabled
Doc ID 13902 Rev 9
449/995
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