cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 121

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

Table 6-36.
28500-DSH-002-C
11:9
8:6
5
4
3
2
1
Bit
TSYNC_EDGE/
TSTUFF_EDGE
TPOLLTH[2:0]
TPORT_TYPE
Field Name
TDAT_EDGE
CTS_EDGE/
STB_EDGE
CTSENB
TRITX
TSIU Port Configuration Register (2 of 3)
Value
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
0
1
0
1
0
1
0
1
0
1
0
Unchannelized mode. The user must configure time slot to contain one time slot.
T1 mode. This mode implies 24 time slots and T1 signalling. The user must configure the time slot map
to contain exactly 24 time slots.
Nx64—2 TS. The user must configure the time slot map to contain two time slots.
Nx64—3 TS. The user must configure the time slot map to contain three time slots.
Nx64—4 TS mode. The user must configure the time slot map to contain four time slots.
Nx64—The user must configure more than 4 time slots.
Channelized TSBUS mode. The user must configure the time slot map to contain at least eight time slots.
Reserved
Poll Throttle. Poll at every frame synchronization event. This mechanism can be used to avoid bus
saturation when multiple logical channels are active and idle and waiting for buffers to service.
Poll at every 2nd frame synchronization event.
Poll at every 4th frame synchronization event.
Poll at every 8th frame synchronization event.
Poll at every 16th frame synchronization event.
Poll at every 64th frame synchronization event.
Poll at every 128th frame synchronization event.
Poll at every 256th frame synchronization event.
Transmitter Frame Synchronization/Receive Stuff Indication—Falling Edge. RSYNC/RSTUFF input
sampled in on falling edge of RCLK.
Transmitter Frame Synchronization/Receive Stuff Indication—Rising Edge. RSYNC/RSTUFF input
sampled in on rising edge of RCLK.
Transmitter Data—Falling Edge. TDAT output driven on falling edge of TCLK.
Transmitter Data—Rising Edge.
Transmitter CTS/TSBUS Strobe—falling edge. CTS/STB input is sampled on the falling edge of TCLK.
Transitter CTS/TSBUS Strobe—rising edge. CTS/STB input is sampled on the rising edge of TCLK.
CTS disabled. This bit is ignored when the port is operating in TSBUS mode.
CTS enabled. This bit is ignored when the port is operating in TSBUS mode.
Transmit Three-state Disabled. When a channel port is enabled, but a time slot within the port is not
mapped via the Time Slot Map, the transmitter outputs a logic 1 on the output data signal.
Transmit Three-state Enabled. When a port is enabled, but a time slot within the port is not mapped via
the Time Slot Map, the transmitter three-states the output data signal.
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Description
Memory Organization
106