CF4320H_09 Datasheet, PDF (4/29 Pages) Texas Instruments – CompactFlash™ BUS-INTERFACE CHIP WITH ±15-kV ESD PROTECTION, TRANSLATION, AND CARD-DETECT CIRCUITRY

CF4320H
CompactFlash™ BUS-INTERFACE CHIP
WITH ±15-kV ESD PROTECTION, TRANSLATION, AND CARD-DETECT CIRCUITRY
SCES655A – APRIL 2006 – REVISED AUGUST 2006
www.ti.com
Direction Signal Bit
The DIR(S/CF) input controls the data direction between the system bus and the CF card. The CF4320H has
circuitry to generate a DIR_OUT signal using the SOE and SIORD signals. DIR(S/CF) and DIR_OUT are placed
adjacent to each other, which is convenient for connecting DIR(S/CF) and DIR_OUT, if DIR_OUT is used. This
saves an additional signal from the system controller to control the data direction. When either SOE or SIORD is
low, the data direction is from the CF card side to the system side (DIR_OUT = L).
BUF_EN
L
L
L
L
H
X
INPUTS
MASTER_EN
L
L
L
L
L
H
DIR_OUT ⁽¹⁾
SOE
L
L
H
H
X
X
SIORD
L
H
L
H
X
X
OUTPUT
DIR_OUT
L
L
L
H
L
Z, low-power mode
(1) X = H or L
4
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