CY7C67300
Document #: 38-08015 Rev. *J
Page 53 of 99
Reserved
Write all reserved bits with ’0’.
IDE Start Address Register [0xC04A] [R/W]
Register Description
The IDE Start Address register holds the start address for an IDE
block transfer. This register is byte addressed and IDE block
transfers are 16-bit words, therefore the LSB of the start address
is ignored. Block transfers begin at IDE Start Address and end
with the final word at IDE Stop Address. When IDE Start Address
equals IDE Stop Address, the block transfer moves one word of
data.
The hardware keeps an internal memory address counter. The
two MSBs of the addresses are not modified by the address
counter. Therefore, the IDE Start Address and IDE Stop Address
must reside within the same 16K byte block.
Address
(Bits [15:0])
The Address field sets the start address for an IDE block transfer.
Table 84. Mode Select Definition
Mode Select [2:0]
Mode
000
IDE PIO Mode 0
001
IDE PIO Mode 1
010
IDE PIO Mode 2
011
IDE PIO Mode 3
100
IDE PIO Mode 4
101
Reserved
110
Reserved
111
Disable IDE port operations
Table 85. IDE Start Address Register
Bit #
15
14
13
12
11
10
9
8
Field
Address...
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Bit #
7
6
5
4
3
2
1
0
Field
...Address
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
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