Datasheet

11.0 System interface

11.1 PCMCIA memory spaces and configuration registers

There are two types of memory address space in the drive: common memory and attribute memory.

Common memory is the working address space used to map the memory arrays for storing data. It may

be accessed by the host for memory read and write operations. The card permits both 8-bit and 16-bit

accesses to all of its common memory addresses. Attribute memory is used for configuration information

and is limited to 8-bit wide accesses only at even addresses. The attribute memory space contains the

Card Information Structure (CIS) and configuration registers. The drive is identified by appropriate infor-

mation in the CIS. The following configuration registers are used to coordinate the I/O specifications and

the Interrupt level of cards that are located in the system.

Invalid Access (Odd Attribute Write)XXXXXXXX01010

Invalid Access (Odd Attribute Read)XXXXXXXX10010

Invalid Access (Odd Attribute Write)1XXXXXXX01001

Invalid Access (Odd Attribute Read)1XXXXXXX10001

Invalid Access (CIS Write)0XXXXX0001001

Card Information Structure read0XXXXX001000X

Common Memory Write (16-bit D15–D0)0XXXXXXX01100

Common Memory Write (8-bit D15–D8)XXXXXXXX01110

Common Memory Write (8-bit D7–D0)XXXXXXXX01101

Configuration Registers Write0XXXXX100100X

Common Memory Read (16-bit D15–D0)0XXXXXXX10100

Common Memory Read (8-bit D15–D8)XXXXXXXX10110

Common Memory Read (8-bit D7–D0)XXXXXXXX10101

Configuration Registers Read0XXXXX101000X

StandbyXXXXXXXXXXX11

Selected spaceA0A1A2A3A8–A4A9A10-WE-OE-REG-CE1-CE2

Figure 38. Registers and memory space decoding

Socket and Copy Register Write011000100100X

Socket and Copy Register Read011000101000X

Pin Replacement Register Write001000100100X

Pin Replacement Register Read001000101000X

Card Status Register Write010000100100X

Card Status Register Read010000101000X

Configuration Option Register Write000000100100X

Configuration Option Register Read000000101000X

Selected spaceA0A1A2A3A8–A4A9A10-WE-OE-REG-CE1-CE2

Figure 39. Configuration registers decoding

Hard disk drive specification for DSCM-11000/-10512/-10340