28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 136

• 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 Time Slot map are listed in
Table 6-8.
6.3.10
28478-DSH-002-E
Descriptor
Time Slot
GroupStr0.Txtime slotMap[2] |= 0x00820000;
/* time slot 3, channel number assigned = 2 */
/* time slot 3, time slot enabled code = 4, enabled and 64 kbps */
GroupStr0.Txtime slotMap[3] |= 0x82000000;
/* either write directly into MUSYCC register - or - use a service request */
*(MUSYCC_FUNC_0_BAR + TX_time slot_MAP_OFFSET) = GroupStr0.Txtime slotMap[0];
/* the value for the first dword becomes Tx time slot Map = 0x8282D180 */
/* each subchannel descriptor is made up of 2 dwords */
/* dword 0 defines the configuration of 1st 4 subchannel bits */
/* dword 1 defines the configuration of 2nd 4 subchannel bits */
/* for demonstration, assign each byte separately */
/* for this example, only logical channel 1 is being subchanneled */
/* dword 0 and 1, for logical channel 0 */
/* dword 2 and 3, for logical channel 1 */
/* dword 4 and 5, for logical channel 2 */
GroupStr0.TxSubchannelMap[4] = 0; /* zero it out for demo purposes */
GroupStr0.TxSubchannelMap[5] = 0; /* zero it out for demo purposes */
/* time slot 1, bit-0 enabled and assigned to channel 1 in time slot map */
/* time slot 1, bit-1 enabled and assigned to channel 1 in subchannel map */
GroupStr0.TxSubchannelMap[4] |= 0x00008100;
/* time slot 1, bit-2 enabled and assigned to channel 1 in subchannel map */
GroupStr0.TxSubchannelMap[4] |= 0x00810000;
/* time slot 1, bit-3 enabled and assigned to channel 1 in subchannel map */
GroupStr0.TxSubchannelMap[4] |= 0x81000000;
/* either write directly into MUSYCC register - or - use a service request */
*(MUSYCC_FUNC_0_BAR + TX_SUBCHANNEL_MAP_OFFSET + 4) = GroupStr0.TxSubchannelMap[0];
*(MUSYCC_FUNC_0_BAR + TX_SUBCHANNEL_MAP_OFFSET + 5) = GroupStr0.TxSubchannelMap[0];
Map
Example—Components of Transmit Time Slot Map – Channel 0
Transmit Subchannel Map
TSEN3/7
CH3/7
TSEN2/6
CH2/6
TSEN1/5
CH1/5
TSEN0/4
CH0/4
Preliminary Information / Mindspeed Proprietary and Confidential
Component of Descriptor
Mindspeed Technologies
4 = Time slot enabled w/ 64 kbps mode
2 = Logical channel 2
4 = Time slot enabled w/ 64 kbps
2 = Logical channel 2
7 = Time slot enables subchannel mode w/ first bit
1 = Logical channel 1
4 = Time slot enabled w/ 64 kbps mode
0 = Logical channel 0
Table
6-8.
®
Value of Components
Basic Operation
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