cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 135

• Manufacturer Part Number: cx28560
• Description: Hdlc Controller
• Manufacturer: Mindspeed Technologies

CX28560 Data Sheet
5.8.8
Table 5-47. TBUFFC Counter Memory
5.8.9
5.8.9.1
28560-DSH-001-B
Length
24
24
24
TMsgCtr
TOctetCtr
TABRTMSG
Counter Name
TBUFFC Counter Memory
TSIU Time Slot Configuration Register
There are 2047 counters of each kind, one for each channel. Each is at an offset of it’s
channels number from the base address. The counters for each channel can be read by
giving the base address of the channels counters and length long enough to encompass
them all.
For a full description of the counters and their use, see
Transmit Time Slot Map
The Transmit Time Slot Map comprises two 8192 entry memories containing slot to
group/channel mapping, and two 512 entry memories of pointers per port or per group.
One set of maps is provided per direction. Each port is assigned a start and end address
within the time slot/group map, and runs on the slots between these addresses. Each
slot may be either a direct mapping to a channel number and relevant parameters, or a
pointer to a group. If the slot contains a pointer to a group, this implies DS0 extraction
is to be performed. The relevant address within the group map pointers will be
accessed to retrieve start, length and current pointers, and the channel number and
relevant parameters will be retrieved from the Group Map (See
NOTE:
A channel may be mapped to more than one time slot within a port (hyperchanneling),
but mapping of one channel to more than one port is illegal and will cause undefined
ordering of data. Hence numerous mappings of time slots are possible, multiple time
slots can be mapped to a single channel or in the case of DS0 extraction mode, to a
single group. For each serial port one time slot map is required (per direction), and
when in TSBUS DS0 extraction mode, group maps should be provided per direction.
Each map is configured independently.
Reset
Value
0
0
0
The group map and DS0 bit extraction are only to be used in ports that are
configured as TSBUS mode in
with the DS0 extraction bit set causes undefined behavior and so is illegal.
Message Counter.
The number of messages transmitted per channel
Octet Counter.
The number of data octets transmitted per channel
Aborted Message Counter.
The number of messages with message aborted during their transmission.
Mindspeed Technologies™
Advance Information
Table 5-53
Description
;
for other ports, a time slot mapped
Appendix
The CX28560 Memory Organization
Figure
A.
5-3).
5
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45