Preliminary
CF CONTROLLER
S3C2451X RISC MICROPROCESSOR
8-2
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
SIGNAL DESCRIPTION
CF interface Signals
Pins
I/O
Description
nCD_CF
1
I
Card detect signals (software control by GPIO MISCCR[30])
nIREQ_CF(EINT[19])
1
I
Interrupt request from CF card.
PC card mode: active low (memory mode: level triggering,
I/O mode: edge triggering). True-IDE mode: active high
nWAIT_CF(nWAIT)
1
I
Wait signal from CF card
nINPACK(EINT[20])
1
I
Input acknowledge in I/O mode
PC card mode: not used
True-IDE mode: DMA request
nCE1_CF(nRCS[2])
1
O
Card enable strobe
PC card mode : lower byte enable strobe
True-IDE mode : chip selection (nCS0)
nCE2_CF(nRCS[3])
1
O
Card enable strobe
PC card mode: higher byte enable strobe
True-IDE mode: chip selection (nCS1)
nREG_CF(EINT[21])
1
O
Register in CF card strobe
PC card mode: It is used for accessing register in CF card
True-IDE mode: DMA Acknowledge
nOE_CF(nOE_CF)
1
O
Output enable strobe
PC card mode: output enable strobe for memory
True-IDE mode: GND.
nWE_CF(nWE_CF)
1
O
Write enable strobe
PC card mode: output enable strobe for memory
True-IDE mode: VCC.
nIORD_CF(nROE)
1
O
Read strobe for I/O mode
nIOWR_CF(nRWE)
1
O
Write strobe for I/O mode
RESET_CF(EINT[22])
1
O
CF card reset
PC card mode: active high
True-IDE mode: active low
ADDR_CF(RADDR[10:0])
11
O
CF card address
PC card mode: full address use
True-IDE mode: only ADDR[2:0] use, The other address line is
connected to GND.
DATA_CF(RDATA[15:0])
16
I/O
CF data bus
CARD_PWREN(EINT[23]) 1 O
Card
power enable strobe (active low)