xccace-tq144 Xilinx Corp., xccace-tq144 Datasheet - Page 22

• Manufacturer Part Number: xccace-tq144
• Description: Ic Ace Controller Chip Tq144
• Manufacturer: Xilinx Corp.

System ACE CompactFlash Solution
BUSMODEREG Register (BYTE address 00h-01h, WORD address 00h)
The BUSMODEREG register is used to control the mode of the MPU address and data bus. The single-bit BUSMODEREG
register is aliased across two BYTE addresses (0x00-0x01) and one 16-bit WORD address (0x0). This register aliasing
ensures that the MPU bus mode can be set regardless of the mode of the microprocessor that is communicating with the
System ACE CF controller.
Table 10: BUSMODEREG Register Bit Descriptions
STATUSREG Register (BYTE address 04h-07h, WORD address 02h-03h)
The STATUSREG register allows a microprocessor to monitor important System ACE CF controller operating modes. This
is also the register that is read upon receiving an IRQ request in order to identify an interrupt source.
description of the STATUSREG register bits.
Table 11: STATUSREG Register Bit Descriptions
22
Bit
Bit
2
3
0
1
2
3
4
5
6
7
0
1
BUSMODE0
--
--
--
--
--
--
--
CFGLOCK
MPULOCK
CFGERROR
CFCERROR
Name
Name
Table 10
The BUSMODE bits are used to select the width of the data bus portion of the
Microprocessor bus (default is 0):
• When 0, the MPU interface is in BYTE mode (all MPU address bits are used, but only
• When 1, the MPU interface is in WORD mode (all MPU data bits are used, but only
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Configuration controller lock status:
• 0 means that the configuration controller does not currently have a lock on the
• 1 means that the configuration controller has successfully locked the CompactFlash
MPU interface lock status:
• 0 means that the MPU interface does not currently have a lock on the CompactFlash
• 1 means that the MPU interface has successfully locked the CompactFlash controller
Configuration Controller error status:
• 0 means that no Configuration Controller error condition exists
• 1 means that an error has occurred in the Configuration Controller (check the
CompactFlash Controller error status:
• 0 means that no CompactFlash Controller error condition exists
• 1 means that an error has occurred in the CompactFlash controller (check the
MPU data bits 7:0 are used).
MPU address bits 6:1 are used).
CompactFlash controller resource
controller resource
controller resource
resource
ERRORREG register for more information)
ERRORREG register for more information)
provides a description of the BUSMODEREG register bits.
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Description
Description
DS080 (v2.0) October 1, 2008
Product Specification
Table 11
provides a
R