28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 135

• 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 Port Configuration Descriptor are listed in
Table 6-6.
6.3.8
The components of the Message Length Descriptor are listed in
Table 6-7.
6.3.9
28478-DSH-002-E
Configuration
Descriptor
Descriptor
Port
/* maximum frame length register 2 = 0x200 */
/* maximum frame length register 1 = 0x400 */
GroupStr0.MessageLengthDescr = 0x02000400;
/* either write directly into MUSYCC register - or - use a service request */
*(MUSYCC_FUNC_0_BAR + MESSAGE_LENGTH_DESCR_OFFSET) = GroupStr0.MessageLengthDescr;
/* each time slot descriptor contains 4 time slot assignments */
/* each byte in the dword descriptor is a time slot assignment */
/* byte 0/dword 0 is for time slot 0 */
/* byte 1/dword 0 is for time slot 1 */
/* byte 2/dword 0 is for time slot 2 */
/* byte 3/dword 0 is for time slot 3 */
/* for demonstration, assign each byte separately */
GroupStr0.Txtime slotMap[0] = 0; /* zero it out for demo purposes */
/* time slot 0, channel number assigned = 0 */
/* time slot 0, time slot enabled code = 4, enabled and 64 kbps */
GroupStr0.Txtime slotMap[0] |= 0x00000080;
/* time slot 1, channel number assigned = 1 */
/* time slot 1, time slot enabled code = 7, subchannel w/ 1st bit active */
GroupStr0.Txtime slotMap[1] |= 0x0000D100;
/* time slot 2, channel number assigned = 2 */
/* time slot 2, time slot enabled code = 4, enabled and 64 kbps */
Descriptor
Descriptor
Message
Length
Example—Components of Port Configuration Descriptor
Example—Components of Message Length Descriptor
Message Length Descriptor
Transmit Time Slot Map—Channel 0
TRITX
ROOF_EDGE
RSYNC_EDGE
RDAT_EDGE
TSYNC_EDGE
TDAT_EDGE
PORTMD
Component of Descriptor
Preliminary Information / Mindspeed Proprietary and Confidential
MAXFRM2
MAXFRM1
Mindspeed Technologies
Component of Descriptor
0 = Three-state output when transmitter enabled and time slot is not mapped
0 = Active edge of signals is falling edge
1 = 32 channel with E1 signalling
Table
Table
®
6-7.
0x200, register 2 to 512 octets
0x400, register 1 to 1024 octets
6-6.
Value of Components
Value of Components
Basic Operation
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