28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 163

• 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

Effects:
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Channel Level Recovery Actions:
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6.4.9.3.2
In the case of underflow due to internal FIFO buffer under-run (BUFF), the internal FIFO buffer becomes empty
when MUSYCC must output data bits (at the serial interface clock rate) and MUSYCC has ownership of a message
buffer in shared memory.
Reasons:
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Effects:
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Channel Level Recovery Actions:
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6.4.9.4
Receive errors are service-affecting and may require a corrective action by a controlling device to resume normal
bit-level processing.
6.4.9.4.1
In the case of overflow due to host ownership of the buffer, the host has not provided sufficient data buffer space to
store received data from the serial interface, and the internal FIFO buffer overflows with received data bits.
Reasons:
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28478-DSH-002-E
The Interrupt Descriptor in Interrupt Queue with ERROR = ONR, DIR = 1.
Data from Data Buffer not being read.
The Buffer Descriptor not overwriting the Buffer Status Descriptor.
No additional activity on the PCI bus for this channel direction.
Transmit channel activity is suspended.
Provide sufficient amount of data for transmission using lists of Message Descriptors with ownership given to
MUSYCC.
Reactivate transmit channel.
Degradation of the host subsystem or application software performance.
Congestion of the PCI bus.
MUSYCC writes the Interrupt Descriptor in Interrupt Queue with ERROR = BUFF, DIR = 1.
Continuous idle code transmission.
Data from data buffer not being read.
The Buffer Descriptor not overwriting the Buffer Status Descriptor.
No additional activity on the PCI bus for this channel direction.
Transmit channel activity is suspended.
Provide sufficient amount of data for transmission using lists of Message Descriptors with ownership given to
MUSYCC.
Reactivate transmit channel.
Degradation of the host subsystem or application software performance.
Underflow Due to Internal FIFO Buffer Under-Run (BUFF)
Receive Errors
Overflow Due to Host Ownership of the Buffer (ONR)
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