Ricoh R5C841 - 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