cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 126

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

The CX28560 Memory Organization
5.7.12
5.7.12.1
Table 5-36. RSIU Time Slot/Group Map Pointer Allocation Register
5.7.13
Table 5-37. RSIU Group Map Pointer Allocation Register
5-36
31:29
28:16
15:13
31:19
12:0
18:6
Bit
Bit
5:0
RSVD
RENDAD_TS[12:0]
RSVD
RSTARTAD_TS[12:0]
RSVD
RSTARTAD
RLENGTH
Field Name
Field Name
RSIU Time Slot Pointer Allocation Register
RSIU Group Map Pointer Allocation Register
Value
There is one RSIU Time Slot Pointer Allocation Descriptor for each of the
CX28560’s 32 serial ports. This register sets the start and end time slot address for the
specific configured port. The difference between the configured end and start address
specifies the number of time slots allocated for the specified serial port.
Time Slot Allocation Rules
In the case of unchannelized mode (i.e., the RPORTTYP field in RSIU Port
Configuration register is programmed to 0), the CX28560 assumes that only one entry
(the one pointed to by STARTAD) is used for this port. This frees the ENDAD
pointer to point to any location in the RSIU time slot memory.
Table 5-36
Splits
—
—
0
1.
2.
3.
Table 5-35
When the serial port is configured to one of the conventional modes, and both
pointers point to the same location, this port should be configured to operate in
unchannelized mode. This is done by setting the RPORTTYP field in
to 0.
When the serial port is configured to one of the conventional modes, if there
are two or more time slots, the RPORTTYP field in RSIU Port Configuration
register must be set to either 5 for non-T1 framing, or 1 to enable T1 framing.
When the serial port is configured to TSBUS mode, RSIU Time Slot Pointer
Allocation Descriptor is to be configured to support more than eight time slots
and the RPORT_TYPE bit field in RSIU Port Configuration register must be
set to TSBUS mode.
Value
Reserved
Starting location in the TS Map of the first Group time slot.
The number of time slots allocated to the group (zero-based count).
—
—
0
0
describes the bit fields in RSIU Time Slot Pointer Allocation Descriptor.
Mindspeed Technologies™
Reserved.
port.
Reserved.
Starting location in the Receive Time Slot Map of the first time slot assigned to
this port.
Ending location in the Receive Time Slot Map of the last time slot assigned to this
into group sections.
Advance Information
Description
Description
CX28560 Data Sheet
28560-DSH-001-B
Table 5-39