t3
SA25–SA0
REG_A
REG_B
MCEL_A
MCEL_B
MCEH_A
MCEH_B
t2
t1
t5
t6
t4
t7
OE
t8
WAIT_AB
Read Cycle Data
SD15–SD0
DBUFOE
DBUFRDL
DBUFRDH
Figure 57. PC Card Common Memory Read Cycle (ÉlanSC400 Microcontroller Only)
Table 45. PC Card Common Memory Read Function (ÉlanSC400 Microcontroller Only)
Mode
REG_x
MCEH_x
MCEL_x
SA0
OE
WE SD15–SD8
SD7–SD0
Byte Access
H
H
H
H
L
L
L
H
L
L
H
H
Three-state
Three-state
Even byte
Odd byte
Word Access
H
H
L
L
L
Indeterminate
Indeterminate
L
L
H
H
Odd byte
Odd byte
Even byte
Odd-Byte-Only Access
H
Three-state
122
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet