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參數(shù)資料
| 型號： | T8531A |
| 廠商： | Lineage Power |
| 英文描述： | Tone Processing(音調(diào)處理器件) |
| 中文描述： | 音處理（音調(diào)處理器件） |
| 文件頁數(shù)： | 16/20頁 |
| 文件大小： | 338K |
| 代理商： | T8531A |
16
Lucent Technologies Inc.
User Manual
September 2000
T8531 and T8531A Tone Processing
Appendix A: ROM Tone Processing Algorithms
(continued)
Subroutine: CID Generation Start
Purpose:
Prepares the data for main part of CID generation subroutine and schedules the
routine on the next frame. CID generation utilizes look-up table based algorithm
and control data to generate caller ID sequence.
Start-up Name:
cidg_start
Operation Name:
cid_gen_tx_part and cid_gen_rx_part
TX or RX:
TX (see Note 1)
Start-up Address:
0x1470
Operation Address:
0x14C8 (TX path) and 0x1604 (RX path) (see Data Exchanges below.)
Function:
Start-up:
1. Stores second sample from decimator for half a frame. Checks if CID time-slot control word is set for present
time slot or if it is 0xCCCC. (Writing 0xCCCC to address 0x05F4 copies the CID control data into all 16 chan-
nels.)
If not: finishes and calls RX path inactive.
2. Copies control data from CID control area to CID operation area for present time slot. Changes RX rtn
address for cid_gen_rx_part and TX rtn address for cid_gen_tx_part. Blanks out RX buffers.
Operation:
TX Part
1. Stores second sample from decimator for half a frame.
2. Calculates output value and stores it for RX part of CID generation.
RX Part
1. Takes output value from TX part of CID generation and calls rx_in (part of RX path active routine).
Started by:
host sets tx_rtn address to 0x1470
Terminated by:
self
Data Setup Required by Start-up Routine:
Data Storage Locations Altered by Start-up Routine and Required by Operation Routine:
Data Name
cidg_ini_table
Address
0x05F4—0x05FF
Value
see CID generation specification
Data Name
cidg_time_slot_ini
cidg_table
Data storage for RX filters
tx_rtn
rx_rtn
Address
0x05EF
Value
0xFFFF or 0xCCCC if value was 0xCCCC
depends on CID control area
0x0000
cid_gen_tx_part
cid_gen_rx_part
Tone TS table + 0x0—0xF
TS info. table + 0x15—0x1d
TS info. table + 0x2
TS info. table + 0x1
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