Ricoh R5C841 User Manual
Page 65
R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
12345
2004
R
EV
. 1.10
5-12
I/O 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#
t8a
Setup Time, CADR [25:0] and REG# before IORD#
Low
Tsu-20 ns
1,3
Tsu=2~7Tcyc
Programmable
t8c
Hold Time, CADR [25:0] and REG# after IORD#
High
Thl-10 ns
1,3
Thl=1~7Tcyc
Programmable
IORD#
t8b
Pulse Duration, IORD # Low
Tpw-20
ns
1,3
Tpw=3~31Tcyc
Programmable
CE
[2:1]#
t8d
Valid Delay, CADR [25:0] and REG# to CE [2:1]#
1Tcyc-10
ns
1
CDATA
[15:0]
t8e
Hold Time, CDATA [15:0] after IORD # High
0
ns
WAIT#
t8f
Hold Time, IORD # Low after WAIT# High
1Tcyc+0
ns
1
t8g
Valid Delay, IORD # Low to WAIT# Low
50
ns
IOIS16#
t8h
Valid Delay, CADR [25:0] to IOIS16# Low
50
ns
INPACK#
t8k
Hold Time, INPACK# Low after IORD# High
0
ns
t8j
Valid Delay, IORD # Low to INPACK# Low
50
ns
Note1: Tcyc is PCICLK cycle time. (Typically 30ns)
Note3: Tsu, Tpw, Thl can be programmed by setting 16-bit I/O Timing 0 register.
16-bit Card I/O Read Timing
INPACK#
WAIT#
CDATA
IORD#
CADR
t8h
t8h
Data Latched
t8f
t8e
Data
t8g
t8a
t8c
t8b
PCICLK
CE1#,CE2#
IOIS16#
t8d
t8j
t8k
16-bit Card I/O Read Timing