28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 159
28478G-18
Manufacturer Part Number
28478G-18
Description
Multichannel Synchronous Communications Controller 208-Pin BGA
Manufacturer
Mindspeed Technologies
Datasheet
1.28478G-18.pdf
(195 pages)
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
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6.4.8.4.6
In the case of an Octet Alignment (ALIGN) error, the HDLC message size after 0-bit extraction is not a multiple of 8
bits.
Reasons:
•
•
Effects:
•
•
•
•
•
•
Channel Level Recovery Actions:
•
6.4.8.4.7
In the case of an Abort Termination (ABT) error, the receiver detects an abort sequence from the distant end. An
abort sequence is defined as 0 followed by 7 consecutive 1s.
Reason:
•
Effects:
•
•
•
•
•
•
Channel Level Recovery Actions:
•
28478-DSH-002-E
Bit errors during transmission.
Incorrect transmission of HDLC messages from the distant end.
The Interrupt Descriptor in Interrupt Queue with ERROR = ALIGN, DIR = 0 (if MSKMSG = 0 in Receive
Channel Configuration Descriptor).
The entire HDLC message is transferred to shared memory.
DMAC accesses the Next Message Pointer from the current Message Descriptor.
Returns ownership of the current Message Descriptor to the host by writing the Receive Buffer Status
Descriptor with ONR = HOST, ERROR = ALIGN (if INHRBSD = 0 in Receive Channel Configuration
Descriptor).
The BLP scans for the opening flag of the next HDLC message.
Simultaneously, DMAC checks for Message Descriptor ownership before transferring received data to shared
memory.
None required.
The distant end can not complete transmission of HDLC message.
The Interrupt Descriptor in Interrupt Queue with ERROR = ABT, DIR = 0 (if MSKMSG = 0 in Receive Channel
Configuration Descriptor).
Partial HDLC message is transferred to shared memory.
DMAC accesses the Next Message Pointer from the current Message Descriptor.
Returns ownership of the current Message Descriptor to the host by writing the Receive Buffer Status
Descriptor with ONR = HOST, ERROR = ABT (if INHRBSD = 0 in Receive Channel Configuration Descriptor).
The BLP scans for the opening flag of the next HDLC message.
Simultaneously, DMAC checks for Message Descriptor ownership before transferring received data to shared
memory.
None required.
Octet Alignment (ALIGN) Error
Abort Termination (ABT)
Preliminary Information / Mindspeed Proprietary and Confidential
Mindspeed Technologies
®
Basic Operation
146
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