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Transcend Information Transcend CF 80X TS32M~1GCF80 User Manual

Page 36

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T

T

T

S

S

S

3

3

3

2

2

2

M

M

M

~

~

~

1

1

1

G

G

G

C

C

C

F

F

F

8

8

8

0

0

0

80X CompactFlash Card

Transcend Information Inc.

V1.1

36

5.1 I/O Primary and Secondary Address Configurations

Table: Primary and Secondary I/O Decoding

Note:

1) Register 0 is accessed with -CE1 low and -CE2 low (and A0 = Don’t Care) as a word register on the combined Odd Data

Bus and Even Data Bus (D15-D0). This register may also be accessed by a pair of byte accesses to the offset 0 with
-CE1 low and -CE2 high. Note that the address space of this word register overlaps the address space of the Error and
Feature byte-wide registers, which lie at offset 1. When accessed twice as byte register with -CE1 low, the first byte to
be accessed is the even byte of the word and the second byte accessed is the odd byte of the equivalent word access.

2) A byte access to register 0 with -CE1 high and -CE2 low accesses the error (read) or feature (write) register.