cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 137

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

CX28560 Data Sheet
5.8.9.2
Table 5-48. TSIU TS/Group Map
28560-DSH-001-B
31:18
16:14
13:3
Bit
17
2
1
0
RSVD
TDS0
RSVD
TCHANNEL[10:0]
TDS0_GROUP
TTS_ENABLE
TMASKEN_SB
TLAST_TS
Field Name
TSIU Time Slot Configuration Descriptor
For each time slot in the Time Slot Map, there is a TSIU Time Slot Configuration
Descriptor. There are 8192 entries in memory that set the translation between time
slots and logical channels or groups for each of the CX28560's 32 ports. The actual
mapping of these time slot descriptors to the 32 ports is done by 32 sets of pointer
pairs (receive and transmit), one pair set for each port, which indicates the start and
the end address of the memory location that belongs to the configured port. Time Slot
pointer allocation is described in TSIU Time Slot Pointer Allocation. The bit fields of
TSIU Time Slot Configuration Descriptor include information:
Table 5-48
type of entry in the specific row of the TS/Group Map is determined by the DS0 bit.
• This time slot should be referred to a group map for a higher level of extraction
• Time slot is enabled or disabled
• Time slot is a full DS0, or sub-channeling enabled so that only a part of 64
• Indicates if it is the first time slot assigned to the logical channel
• Logical channel number (max 2047).
Value
—
—
0
0
1
0
0
1
0
1
0
1
Kbps transports information
specifies the content of each receive time slot configuration descriptor. The
Reserved
DS0 extraction mode is disabled
DS0 mode is enabled.
This bit must only be set if the port to which this time slot is connected is configured
as TSBUS Mode see )
Reserved
If DS0 extraction mode is disabled for this time slot, this field represents the logical
channel number assigned to the time slot.
If DS0 extraction mode is enabled for this time slot, the lower 9 bits of this field
represent the logical channel number assigned to the time slot.
Time Slot Disabled or DS0 extraction mode is enabled.
Time Slot Enabled.
This bit is only valid if DS0 extraction mode is disabled (TDS0 = 0)
The TMASK_SB bit field () is ignored. All the 8 bits of the time slot are processed. This
value is also possible if DS0 extraction mode is enabled.
Allow data mask for time slot. Only the bits specified by the TMASK_SB bit field () are
processed. This bit is only valid if DS0 extraction mode is disabled (TDS0 = 0)
This bit field indicates that the specified time slot is not the last time slot of the logical
channel or that DS0 extraction mode is disabled (TDS0 = 0)
This bit field indicates that the specified time slot is the last time slot of the logical
channel
NOTE(S):
operate over the serial port must have one time slot assigned to that logical channel
as the last time slot for that channel.
Mindspeed Technologies™
If a serial port is configured to transparent mode, each channel defined to
Advance Information
Description
The CX28560 Memory Organization
5
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47