CHAPTER 17 COMPACTFLASH CONTROLLER (ECU)
User’s Manual U14272EJ3V0UM
337
17.4.4 ITGENCTREG (Index: 0x03)
Bit
7
6
5
4
3
2
1
0
Name
RI_EN
CRDRST
CRDTYP
Reserved
IRQSEL3
IRQSEL2
IRQSEL1
IRQSEL0
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
1
1
Bit
Name
Function
7
RI_EN
Ring indicate enable. This bit is used to switch the function of the STSCHG#/RI#
signal from the I/O card. The ring indicator function cannot be used in the V
R
4181
so that 0 must be written to this bit.
0 : Used as the STSCHG#.
The current status of the signal is read from the IF_STAT_REG register
if this signal is configures as a source for the card status change interrupt.
1 : Used as the RI#
For memory PC Cards, this bit has no function.
6
CRDRST
Card reset. This bit is for a software reset to the PC Card to which the status of
the CF_RESET signal is set.
0 : Active
The CF_RESET signal will be active until this bit is set to 1.
1 : Inactive
5
CRDTYP
Card type
0 : Memory card
1 : I/O card
4
Reserved
0 is returned when read
3 to 0
IRQSEL(3:0)
Interrupt request steering for the I/O card IREQ (CF_BUSY#) signal
0000 : IRQ is not used
0001 : RFU
0010 : RFU
0011 : IRQ3 is used
0100 : IRQ4 is used
0101 : IRQ5 is used
0110 : RFU
0111 : IRQ7 is used
1000 : RFU
1001 : IRQ9 is used
1010 : IRQ10 is used
1011 : IRQ11 is used
1100 : IRQ12 is used
1101 : RFU
1110 : IRQ14 is used
1111 : IRQ15 is used