MSM60804 Datasheet, PDF (24/53 Pages) OKI electronic componets – PCMCIA Host Adapter

¡ Semiconductor
MSM60804
PCIC Register Access
• The MSM60804 provides a 40h register space for each slot.
• The register address of slot A is 3Fh and the register address of slot B is 40h to 7Fh.
• When two MSM60804 chips are cascaded, register addresses are decoded according to the
status of the SEL0 signal. Register addresses of slot C and slot D are respectively 80h to BFh
and C0h to FFh.
SEL 0
Base Address
Index
Slot
0
0h
0h-3Fh
0 (A)
0
0h
40h-7Fh
1 (B)
1
80h
80h-BFh
2 (A)
1
80h
C0h-FFh
3 (B)
• Accessing to the register address space is indirect addressing through I/O addresses of 3E0h
and 3E1h.
• The I/O address 3E0h specifies the register address to be accessed.
• The I/O address 3E1h accesses a register specified by 3E0h.
Selection of Memory Mode or I/O Mode
• The Memory PC Card Access Mode and the I/O PC Card Access mode are switched by
register setting.
• A PC card access mode is selected by the following register:
Interrupt & General Control Register (+03h and +43h)
• Functions of a specific pin of the PCMCIA are switched by mode switching.
Detection of Card Interface Status
• The MSM60804 detects the following seven PC card statuses and reflects them upon register
values:
• The seven states are as follows:
Card detection (CD1 or CD2)
Card Power Supply Active (V10 or V11)
Voltage Sense (VSS0 or VSS1)
Ready/Busy (RDY) (for memory cards only)
Write Protect (WP) (for memory cards only)
Battery Voltage Detect (BV1 or BV2) (for memory cards only)
Status Change (BV1) (for I/O mode only)
• The detected state is reflected upon the following two registers:
Interface Status register (+02h and +42h)
Voltage Control register (+17h and +57h)
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