cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 107

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

6.6.1
The RSLP Channel Status register is a Read Only (RO) register.
It provides information from RSLP block regarding the channel state and status. There is one RSLP Channel status
register for each of CX28500’s channels (i.e., 1024 registers).
Table 6-22.
6.6.2
The Receive Channel Configuration register contains configuration bits applying to the logical channels within
CX28500. There are 1024 such registers, one for each channel. The RSLP Channel Configuration Descriptor
configures aspects of the channel common to all messages passing through the channel. One descriptor exists for
each logical channel direction.
descriptor.
Table 6-23.
28500-DSH-002-C
31:4
3:1
0
31:30
29
28:21
20:5
4:3
Bit
Bit
Field Name
RACTIVE
RPROTCOL[1:0]
RSVD
RSVD
MAXSEL[1:0]
Field Name
RMASK[7:0]
RSLP Channel Status Register
RSLP Channel Configuration Register (1 of 2)
RSVD
RINV
RSLP Channel Status Register
RSLP Channel Configuration Register
Host
R
R
R
Value
Table 6-23
—
0
1
2
3
0
1
0
0
1
2
3
Don’t care
Value
0
0
1
Mindspeed Proprietary and Confidential
Mindspeed Technologies
TRANSPARENT.
HDLC with no FCS.
Used in ISLP or full packet forwarding and/or channel monitoring application.
For this mode the SHT message detection is disabled. Any number of bytes can be transmitted and
received within any single message including messages of only one byte.
HDLC with FCS16 (FCS—2 bytes).
HDLC with FCS32 (FCS—4 bytes).
Data Inversion disabled.
Data Inversion enabled. Message is received from SIU with polarity change (the inversion is done to
all received bits).
Data Mask. Only bits with a value of 1 contain relevant data (e.g., Mask = 10000001, then only bits 0
and 7 contain channel's data). Enables the subchanneling feature.
Reserved.
Message Length–Disable maximum message length check.
Message Length–Use MAXFRM1 bit field in the message length descriptor for maximum receive
message length limit.
Message Length–Use MAXFRM2 bit field in the message length descriptors maximum receive
message length limit.
Message Length–Use MAXFRM3 bit field in the message length descriptor for maximum receive
message length limit.
lists the values and descriptions of each channel configuration
Reserved.
Reserved.
Channel Inactive.
The channel has been deactivated due to either a service request channel deactivation or
Reset (PCI Reset or Soft Chip Reset)
Channel Active. The channel has been activated by service request channel activation.
®
Description
Description
Memory Organization
92