Manual

220 Series Commercial Grade CF Product Manual v2.0Cactus Technologies
®
18
As in the Main Memory Read functions, the signals -CE1 and -CE2 control the even-byte and
odd-byte address, but only the even-byte data is valid during the Attribute Memory access.
Refer to Table 3-10 for signal states and bus validity for the Attribute Memory function.
As in the Main Memory Read functions, the signals -CE1 and -CE2 control the even-byte and
odd-byte address, but only the even-byte data is valid during the Attribute Memory access.
Refer to Table 3-10 for signal states and bus validity for the Attribute Memory function.
3.4.1. Attribute Memory Function
3.4.2. Conguration Option Register
(Address 200h in Attribute Memory)
Attribute memory is a space where CompactFlash Memory Card CIS and congurations registers
are stored, and is limited to 8-bit wide accesses only at even addresses.
The Conguration Option Register is used to congure the cards interface, address decoding
and interrupt and to issue a soft reset to the CompactFlash Memory Card.
Function Mode -REG -CE2 -CE1 A9 A0 -OE -WE D15-D8 D7-D0
Standby Mode
X H H X X X X High Z High Z
Read Byte Access CIS ROM
(8 bits)
L H L L L L H High Z Even Byte
Write Byte Access CIS
(8 bits) (Invalid)
L H L L L H L Do not care Even Byte
Read Byte Access
Configuration (8 bits)
L H L H L L H High Z Even Byte
Write Byte Access
Configuration (8 bits)
L H L H L H L Do not care Even Byte
Read Word Access CIS
(16 bits)
L L L L X L H Not Valid Even Byte
Write Word Access CIS
(16 bits) (Invalid)
L L L L X H L Do not care Even Byte
Read Word Access
Configuration (16 bits)
L L L H X L H Not Valid Even Byte
Write Word Access
Configuration (16 bits)
L L L H X H L Do not care Even Byte
Table 3-10. Attribute Memory Function
NOTE: The -CE signal or both the -OE signal and the -WE signal must be de-asserted between consecutive cycle operations.
Operation D7 D6 D5 D4 D3 D2 D1 D0
R/W
SRESET LevlREQ Conf5 Conf4 Conf3 Conf2 Conf1 Conf0