28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 137

• 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

The components of the Transmit Subchannel map are listed in
Table 6-9.
6.3.11
28478-DSH-002-E
Descriptor
Subchannel
Subchannel
/* note +4 and +5 dword offsets into the subchannel map are for channel 1 bits */
/* the value for the 4th dword becomes Tx Subchannel Map = 0x81818100 */
/* the value for the 5th dword becomes Tx Subchannel Map = 0x00000000 */
/* each transmit channel descriptor is made up of 1 dwords */
/* need to define channel 0, 1, and 2 - 3 dwords total */
/* dword 0 for logical channel 0 */
/* dword 1 for logical channel 1 */
/* dword 2 for logical channel 2 */
/* for logical channel 0 */
/* pad count adjustment = 0, disabled */
/* buffer location index = 0 */
/* data inversion = 0, disabled */
/* internal buffer length = 0 */
/* end of padfill interrupt = 0, disabled */
/* protocol = 2, hdlc-16-fcs */
/* message length check register = 1, use register 1 */
/* fcs transfer = 0, normal, do not transfer rx fcs into shared memory */
/* mask suerr interrupt = 0, do not mask, enable interrupt */
/* mask sinc. interrupt = 0, do not mask, enable interrupt */
/* mask sdec. interrupt = 0, do not mask, enable interrupt */
/* mask sfilt interrupt = 0, do not mask, enable interrupt */
/* mask idle. interrupt = 0, do not mask, enable interrupt */
/* mask msg interrupt = 0, do not mask, enable interrupt */
(dword 4)
(dword 5)
Map
Map
Example—Components of Transmit Subchannel Map
Transmit Channel Configuration Descriptor
Preliminary Information / Mindspeed Proprietary and Confidential
BITEN3/7
CH3/7
BITEN2/6
CH2/6
BITEN1/5
CH1/5
BITEN0/4
CH0/4
TSEN3/7
CH3/7
TSEN2/6
CH2/6
TSEN1/5
CH1/5
TSEN0/4
CH0/4
Component of Descriptor
Mindspeed Technologies
1 = Bit 3 enabled
1 = Logical channel 1
1 = Bit 2 enabled
1 = Logical channel 1
1 = Bit 1 enabled
1 = Logical channel 1
0 = Bit 0 not assigned here, see Time Slot Map
0 = Bit 0 not assigned here see Time Slot Map
0 = Bit 7 disabled
0 = Don’t care
0 = Bit 6 disabled
0 = Don’t care
0 = Bit 5 disabled
0 = Don’t care
0 = Bit 4 disabled
0 = Don’t care
Table
®
6-9.
Value of Components
Basic Operation
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