XCCACE128-I Xilinx Inc, XCCACE128-I Datasheet - Page 29

• Manufacturer Part Number: XCCACE128-I
• Description: IC 128MBIT ACE FLASH CARD
• Manufacturer: Xilinx Inc

Specifications of XCCACE128-I

• Memory Size: 128Mb
• Memory Type: FLASH
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SECCNTCMDREG Register (BYTE address 014h-15h, WORD address 0Ah)
The SECCNTCMDREG register provides the means for an
MPU interface to set the sector count and execute Com-
pactFlash Controller commands.
description of the SECCNTCMDREG register bits.
The SECCNT bits of the SECCNTCMDREG register spec-
ify the number of sectors to transfer during each ReadMem-
CardData or WriteMemCardData command:
•
•
The CMD bits of the SECCNTCMDREG register identify a
specific command to be executed:
Table 15: SECCNTCMDREG Register Bit Descriptions
DS080 (v2.0) October 1, 2008
Product Specification
Bit
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
A SECCNT value of 1 to 255 indicates to the
CompactFlash device that 1 to 255 sectors should be
transferred.
A SECCNT value of 0 indicates that 256 sectors should
be transferred.
SECCNT0
SECCNT1
SECCNT2
SECCNT3
SECCNT4
SECCNT5
SECCNT6
SECCNT7
CMD0
CMD1
CMD2
--
--
--
--
--
R
Name
Sector Count used during CompactFlash read or write sector commands: each sector is
made up of 512 bytes
Command value:
Reserved
Reserved
Reserved
Reserved
Reserved
0x0 : Reserved
0x1 : ResetMemCard command
0x2 : IdentifyMemCard command
0x3 : ReadMemCardData command
0x4 : WriteMemCardData command
0x5: Reserved
0x6 : Abort command
0x7 : Reserved
Table 15
provides a
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•
•
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If the MPU has NOT successfully locked access to the
CompactFlash Controller, then writes to the CMD bits
of the SECCNTCMDREG register do not change the
value of the register.
If the MPU has successfully locked access to the
CompactFlash Controller and a non-zero value is
written to the CMD bits of the SECCNTCMDREG
register, then the specified command is executed by
the CompactFlash Controller.
If the MPU has successfully locked access to the
CompactFlash Controller and a zero value is written to
the CMD bits of the SECCNTCMDREG register, there is
no effect on the value of the CMD bits. The only way to
clear the CMD bits is to issue the cfAbort command,
which aborts the currently executing command and
waits until the CompactFlash Controller clears the CMD
bits.
Description
System ACE CompactFlash Solution
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