3 16-bit pc card interface signals – Ricoh R5C841 User Manual
Page 63
R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
12345
2004
R
EV
. 1.10
5-10
5.3.3 16-bit PC Card Interface signals
Memory Read
(VCC_ROUT= 1.65~1.95V, VCC_3V=3.0~3.6V, Ta=0~70ºC)
Symbol Parameter
Min
Max
Unit
Note
CADR [25:0], REG#, CE [2:1]#
t6a
Setup Time, CADR [25:0], REG# and CE
[2:1]# before OE# Low
Tsu-20 ns 1,2
Tsu=1~7Tcyc
Programmable
t6c
Hold Time, CADR [25:0], REG# and CE
[2:1]# after OE# High
Thl-10 ns 1,2
Thl=1~7Tcyc
Programmable
OE#
t6b
Pulse Duration, OE# Low
Tpw-20
ns
1,2
Tpw=3~31Tcyc
Programmable
CDATA
[15:0]
t6d
Hold Time, CDATA [15:0] after OE# High
0
ns
WAIT#
t6e
Hold Time, OE# Low after WAIT# High
1Tcyc+0
ns
1
t6f
Valid Delay, OE# Low to WAIT# Low
50
ns
Note1: Tcyc is PCICLK cycle time. (Typically 30ns)
Note2: Tsu, Tpw, Thl can be programmed by setting 16-bit Memory Timing 0 register.
16-bit Card Memory Read Timing
WAIT#
CDATA
OE#
CADR,REG#,
CE1#,CE2#
t6b
Data Latched
t6c
t6e
t6d
Data
t6f
t6a
PCICLK
16-bit Card Memory Read Timing