Section 27 NAND Flash Memory Controller (FLCTL)
Rev.1.00 Dec. 13, 2005 Page 1022 of 1286
REJ09B0158-0100
Data Error:
•
When a program error or erase error occurs, the error is reflected on the error source flags.
Interrupts for each source can be specified.
•
When an ECC error is detected by software, perform an error correction, specify another sector
to be replaced, and copy the contents of the block to another sector as required.
Data Transfer FIFO:
•
The 224-byte FLDTFIFO is incorporated for data transfer of flash memory.
•
The 32-byte FLECFIFO is incorporated for data transfer of a control code.
•
Flag bit for detecting overrun/underrun during access from the CPU or DMA
DMA Transfer:
•
By individually specifying the destinations of data and control code of flash memory to the
DMA controller, data and control code can be sent to different areas.
Access Size:
•
Registers can be accessed in 32 bits or 8 bits. Registers must be accessed in the specified
access size.
•
FIFOs are accessed in 32 bits (4 bytes). Set the byte number for read to a multiple of four, and
the byte number for write to a multiple of four.
Access Time:
•
The operating frequency of the FLCTL pins can be specified by the FCKSEL bit and the
QTSEL bit in the common control register (FLCMNCR), regardless of the operating frequency
of the peripheral bus.
•
The operating clock FCLK on the pins for the NAND-type flash memory is generated by
dividing a peripheral clock (Pck).
•
In NAND-type flash memory, the
FRE
and
FWE
pins operate with the frequency (FCLK) on
the pins which common control register (FLCMNCR) designated. To ensure the setup time,
this operating frequencies must be specified within the maximum operating frequency of
memory to be connected.
Содержание SH7780 Series
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