t11
t3
SA25–SA0
REG_A
REG_B
t9
t2
t5
t1
t6
t4
t7
IOR
t8
WAIT_AB
MCEL_A
MCEL_B
MCEH_A
MCEH_B
t10
WP_x
(IOCS16_x)
Read Cycle Data
SD15–SD0
DBUFOE
DBUFRDL
DBUFRDH
Figure 59. PC Card I/O Read Cycle
Table 47. PC Card I/O Read Function (ÉlanSC400 Microcontroller Only)
Mode
REG_x
MCEH_x
MCEL_x
SA0
IOR
IOW
SD15–SD8 SD7–SD0
Byte Access
L
L
H
H
L
L
L
H
L
L
H
H
Three-state Even byte
Three-state Odd byte
Word Access
High Byte Only
L
L
L
L
L
Indeterminate
Indeterminate
L
L
H
H
Odd byte
Odd byte
Even byte
H
Three-state
124
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet