28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 96

• Manufacturer Part Number: 28478G-18
• Description: Multichannel Synchronous Communications Controller 208-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of 28478G-18

• Package: 208BGA
• Maximum Data Rate: 32768 Kbps
• Transmission Media Type: Wire
• Power Supply Type: Analog
• Typical Supply Current: 250 mA
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3 V
• Maximum Operating Supply Voltage: 3.6 V

5.2.2.3
The Group Configuration Descriptor contains configuration bits applying to all 32 logical channels within a given
channel group as listed in
Table 5-10.
28478-DSH-002-E
Field
31:22
21:16
14:12
11:10
Bit
15
9
8
7
POLLTH[1:0]
SUET[5:0]
INHRBSD
INHTBSD
MEMPVA
SFALIGN
Group Configuration Descriptor (1 of 2)
Name
RSVD
RSVD
Group Configuration Descriptor
Table
Preliminary Information / Mindspeed Proprietary and Confidential
Value
0
0
1
0
0
1
2
3
0
1
0
1
0
1
5-10.
Reserved.
Signal Unit Error Threshold. Sets maximum value of SUERM counter. When SUERM exceeds this
count, a SUERR interrupt is generated.
Super Frame Alignment. Flywheel Mechanism. Select roll over to 0 of time slot counter (the flywheel
mechanism in the serial interface) as a frame synchronization event.
For a transparent mode channel, wait for the flywheel to roll over to start message processing after
channel activation.
For descriptor polling, use the flywheel roll-over as a frame synchronization event. The polling
frequency is determined by using the poll-throttle field elsewhere in this descriptor.
Super Frame Alignment. External Signal. Select detection of frame synchronization signal (TSYNC or
RSYNC) assertion as frame synchronization event.
For a transparent mode channel, wait for assertion of signal to start message processing after channel
activation.
For descriptor polling, use assertion of signal as frame synchronization event. Polling frequency is
determined by using poll-throttle field elsewhere in this descriptor.
Reserved.
Poll Throttle. Poll at every frame synchronization event. Not supported.
Poll at every 16
Poll at every 32
Poll at every 64
Inhibit Transmit Buffer Status Descriptor Disabled. At end of each transmitted data buffer, do not
inhibit (allow) overwriting of Tx Buffer Descriptor with a Tx Buffer Status Descriptor.
Inhibit Transmit Buffer Status Descriptor. As the Tx Buffer Status Descriptor is being inhibited, the
host must rely on an interrupt for status information regarding transmitted data message.
Inhibit Receive Buffer Status Descriptor Disabled. At the end of each Receive Data Buffer, do not
inhibit (allow) overwriting of Rx Buffer Descriptor with a Rx Buffer Status Descriptor.
Inhibit Receive Buffer Status Descriptor. As the Rx Buffer Status Descriptor is being inhibited, the host
must rely on an interrupt for status information regarding the received data message.
Memory Protection Violation Action. Reset Group. On a memory protection violation error, group
reset is performed. As a result, all 32 channels are deactivated in both receive and transmit directions.
Memory Protection Violation Action. Deactivate Channel. On a memory protection violation error, only
the channel being serviced during violation is deactivated in both receive and transmit directions.
Mindspeed Technologies
th
nd
th
frame synchronization event.
frame synchronization event.
frame synchronization event.
®
Description
Memory Organization
83