HFC-SP Cologne Chip AG, HFC-SP Datasheet - Page 20

• Manufacturer Part Number: HFC-SP
• Description: Isdn S/t HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

863 C@
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control register
Plug and Play
address
*)
04h
05h
06h
07h
only if the isolation process is finished; the last card remains in isolation state until a CSN is
assigned.
Write
Read
r/w
r
r
r
Accessable in state
Isolation state
Config state
Config state
Config state
Config state
*)
,
Resource data register. This register is used to read
the device's recource data. Each time that a read is
performed from this register a byte of the resource
data is returned and the resource data pointer is
incremented. Prior to reading each byte, the
programmer must read from the status register to
determine if the next byte is available for reading
from the resource data register.
The card's serial identifier and checksum must be read
prior to accessing the resource requirement list via
this register.
Status register. Prior to reading the next byte of the
device's resource data, the programmer must read
from this register and check bit 0 for a one. This is the
resource data byte available bit. Bits[7:1] are
reserved.
Card
configuration software uses the CSN register to assign
a unique ID to the card. The CSN is then used to wake
up the card's configuration logic whenever the
configuration program must access its configuration
registers.
Logical device number register. The number in this
register points to the logical device the next
commands will operate on. The HFC-SP only
supports one logical device. This register is hardwired
to all zeros.
select
number
Description
(CSN)
register.
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Cologne
Chip
The