t11
t3
SA25–SA0
REG_A
REG_B
t9
t1
t2
t4
t5
IOW
WAIT_AB
MCEL_A
MCEL_B
t10
MCEH_A
MCEH_B
WP_x
(IOCS16_x)
Write Cycle Data
SD15–SD0
DBUFOE
DBUFRDL
DBUFRDH
Figure 60. PC Card I/O Write Cycle
Table 48. PC Card I/O Write 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
H
H
L
L
Indeterminate
Indeterminate
Even byte
Odd byte
Word Access
L
L
L
L
L
Indeterminate
Indeterminate
H
H
L
L
Odd byte
Odd byte
Even byte
Odd-Byte-Only Access
H
Indeterminate
Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet
125