THNCF064MMA Datasheet, PDF (11/47 Pages) Toshiba Semiconductor – The THNCFxxxxMA series CompactFlash card is a flash technology based with ATA interface flash memory card

Preliminary
THNCFxxxxMA Series
2. Task File register access specifications
There are two cases of Task File register mapping, one is mapped I/O address area, the other is mapped
Memory address area. Each case of Task File registers read and write operations is executed under the
condition as follows. That area can be accessed by Byte/World/Odd Byte modes, which are defined by PC card
standard specifications.
• (1) I/O address map
Task File Register Read Access Mode (1)
Mode
−REG −CE2 −CE1
Standby mode
X
H
H
Byte access (8bit)
L
H
L
L
H
L
Word access (16bit)
L
L
L
Odd byte access (8bit)
L
L
H
Note: X Ë  L or H
A0 −IORD −IOWR −OE −WE D8 to D15 D0 to D7
X
Xç
Xç
Xç
Xç High-Z High-Zç
L
Lç
Hç
Hç
Hç High-Zç even byte
H
Lç
Hç
Hç
Hç High-Z odd byteç
X
Lç
Hç
Hç
Hç odd byte even byteç
X
Lç
Hç
Hç
Hç odd byteç High-Zç
• Task File Register Write Access Mode (1)
Mode
−REG −CE2 −CE1
Standby mode
X
H
H
Byte access (8bit)
L
H
L
L
H
L
Word access (16bit)
L
L
L
Odd byte access (8bit)
L
L
H
Note: X Ë  L or H
A0 −IORD −IOWR −OE −WE D8 to D15 D0 to D7
X
X
X
Xç
Xç Don’t care Don’t careç
L
H
L
Hç
Hç Don’t careç even byte
H
H
L
Hç
Hç Don’t care odd byteç
X
H
L
Hç
Hç odd byte even byteç
X
H
L
Hç
Hç odd byteç Don’t careç
• Task File Register Access Timing Example (1)
A0~A10
−REG
−CE2/−CE1
−IORD
−IOWR
D0~D15
Dout
Din
Read cycle
Write cycle
2002-10-20 11/47