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CHAPTER 17 COMPACTFLASH CONTROLLER (ECU)
17.1 General
The V
4181 provides an ExCA-compatible controller (ECU) supporting a single CompactFlash slot. The interface
R
for this controller is shared with that of the keyboard interface unit. To use this interface for CompactFlash control, the
KEYSEL bit of the KEYEN register in the GIU must be clear to 0. Also, to use CF_BUSY# signal as an activation
factor, the CompactFlash interface must be enabled during Hibernate mode by writing 1 to the CFHIBEN bit of the
KEYEN register.
17.2 Register Set Summary
This section provides details of the ECU registers. Two of the ECU registers are located in the I/O addressing
space. These registers, as well as the Interrupt and Configuration registers, are shown in the following table.
Physical address
R/W
0x0B00 08E0
R/W
0x0B00 08E1
R/W
0x0B00 08F8
R
0x0B00 08FA
R/W
0x0B00 08FE
R/W
The remaining ECU registers listed below are all 8-bit width and accessed through the Index register and the Data
register.
328
Table 17-1. ECU Control Registers
Register symbol
ECUINDX
Index register (I/O space)
ECUDATA
Data register (I/O space)
INTSTATREG
Interrupt status register
INTMSKREG
Interrupt mask register
CFG_REG_1
Configuration register 1
User's Manual U14272EJ3V0UM
Function
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