DS2155 datasheet(103/262 Pages) DALLAS

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DS2156

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16.1 Idle-Code Programming Examples

Example 1

Sets transmit channel 3 idle code to 7Eh.

Write IAAR = 02h

;select channel 3 in the array

Write PCICR = 7Eh ;set idle code to 7Eh

Example 2

Sets transmit channels 3, 4, 5, and 6 idle code to 7Eh and enables transmission of idle codes for those channels.

Write IAAR = 02h

;select channel 3 in the array

Write PCICR = 7Eh

;set channel 3 idle code to 7Eh

Write PCICR = 7Eh

;set channel 4 idle code to 7Eh

Write PCICR = 7Eh

;set channel 5 idle code to 7Eh

Write PCICR = 7Eh

;set channel 6 idle code to 7Eh

Write TCICE1 = 3Ch

;enable transmission of idle codes for channels 3,4,5, and 6

Example 3

Sets transmit channels 3, 4, 5, and 6 idle code to 7Eh, EEh, FFh, and 7Eh, respectively.

Write IAAR = 02h

Write PCICR = 7Eh

Write PCICR = EEh

Write PCICR = FFh

Write PCICR = 7Eh

Example 4

Sets all transmit idle codes to 7Eh.

Write IAAR = 4xh

Write PCICR = 7Eh

Example 5

Sets all receive and transmit idle codes to 7Eh and enables idle code substitution in all E1 transmit and receive

channels.

Write IAAR = Cxh

;enable block write to all transmit and receive positions in the array

Write PCICR = 7Eh

;7Eh is idle code

Write TCICE1 = FEh

;enable idle code substitution for transmit channels 2 through 8

;Although an idle code was programmed for channel 1 by the block write

;function above, enabling it for channel 1 would step on the frame

;alignment, alarms, and Sa bits

Write TCICE2 = FFh

;enable idle code substitution for transmit channels 9 through 16

Write TCICE3 = FEh

;enable idle code substitution for transmit channels 18 through 24

;Although an idle code was programmed for channel 17 by the block write

;function above, enabling it for channel 17 would step on the CAS frame

;alignment, and signaling information

Write TCICE4 = FFh

;enable idle code substitution for transmit channels 25 through 32

Write RCICE1 = FEh

;enable idle code substitution for receive channels 2 through 8

Write RCICE2 = FFh

;enable idle code substitution for receive channels 9 through 16

Write RCICE3 = FEh

;enable idle code substitution for receive channels 18 through 24

Write RCICE4 = FFh

;enable idle code substitution for receive channels 25 through 32

DS2155 Datasheet(PDF) 103 Page - Dallas Semiconductor

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