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DS2155 Datasheet(PDF) 95 Page - Dallas Semiconductor |
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DS2155 Datasheet(HTML) 95 Page - Dallas Semiconductor |
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95 / 238 page  DS2155 95 of 238 16.2.3 Software Signaling Insertion-Enable Registers, T1 Mode In T1 mode, only registers SSIE1–SSIE3 are used since there are only 24 channels in a T1 frame. Register Name: SSIE1 Register Description: Software Signaling Insertion Enable 1 Register Address: 08h Bit # 7 6 5 4 3 2 1 0 Name CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 Default 0 0 0 0 0 0 0 0 Bits 0 to 7/Software Signaling Insertion Enable for Channels 1 to 8 (CH1 to CH8). These bits determine which channels are to have signaling inserted from the transmit signaling registers. 0 = do not source signaling data from the TSx registers for this channel 1 = source signaling data from the TSx registers for this channel Register Name: SSIE2 Register Description: Software Signaling-Insertion Enable 2 Register Address: 09h Bit # 7 6 5 4 3 2 1 0 Name CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9 Default 0 0 0 0 0 0 0 0 Bits 0 to 7/Software Signaling Insertion Enable for Channels 9 to 16 (CH9 to CH16). These bits determine which channels are to have signaling inserted from the transmit signaling registers. 0 = do not source signaling data from the TSx registers for this channel 1 = source signaling data from the TSx registers for this channel Register Name: SSIE3 Register Description: Software Signaling-Insertion Enable 3 Register Address: 0Ah Bit # 7 6 5 4 3 2 1 0 Name CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17 Default 0 0 0 0 0 0 0 0 Bits 0 to 7/Software Signaling Insertion Enable for Channels 17 to 24 (CH17 to CH24). These bits determine which channels are to have signaling inserted from the transmit signaling registers. 0 = do not source signaling data from the TSx registers for this channel 1 = source signaling data from the TSx registers for this channel 16.2.4 Hardware-Based Mode In hardware-based mode, signaling data is input through the TSIG pin. This signaling PCM stream is buffered and inserted to the data stream being input at the TSER pin. Signaling data can be inserted on a per-channel basis by the transmit hardware-signaling channel-select (THSCS) function. The user has the ability to control which channels are to have signaling data from the TSIG pin inserted into them on a per-channel basis. See Section 7 for details on using this per-channel (THSCS) feature. The signaling insertion capabilities of the framer are available whether the transmit- side elastic store is enabled or disabled. If the elastic store is enabled, the backplane clock (TSYSCLK) can be either 1.544MHz or 2.048MHz. Also, if the elastic is enabled in conjunction with transmit hardware signaling, CCR3.7 must be set = 0. |
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