T8531-TL-DB Agere Systems, Inc., T8531-TL-DB Datasheet - Page 41

• Manufacturer Part Number: T8531-TL-DB
• Description: Multichannel programmable codec chip set. Dry pack tray.
• Manufacturer: Agere Systems, Inc.

November 2000
Lucent Technologies Inc.
Software Interface
Table 41 shows the memory map for the DSP engine ROM. The ROM information is not accessible via the micro-
processor. The total ROM size is 8 Kwords.
Table 41. DSP Engine ROM Memory Map
0x1D00—0x1DBB
0x1CD0—0x1FFF
0x07A0—0x0B7F
0x0E00—0x0F1F
0x1070—0x146F
Address Range
0x1CAD
0x1B3C
0x1BD0
0x1BD3
0x1CA6
0x0C00
0x0FFE
0x0FFF
0x14C8
0x16AA
0x16FE
0x1C30
0x1C37
0x0003
0x0008
0x000B
0x0380
0x03B0
0x03B8
0x0400
0x0500
0x0503
0x0600
0x0610
0x0680
0x0690
0x0700
0x0720
0x0B80
0x0F20
0x0F30
0x0F40
0x0F60
0x1000
0x102B
0x105A
0x1470
0x1604
0x160E
0x1650
HDS interrupt service routine
Time-slot sync interrupt service routine
Start-up routine
Time segment controller (ts_proc)
Reserved
Reserved
Transmit path active routine
Receive path active routine
RX path active without reading from the system interface
Transmit path inactive/loopback routine
Transmit path inactive routine
Receive path inactive/loopback routine
Receive path inactive routine
Self-test pass 1 setup (TX)
Self-test pass 2 setup (RX)
Reserved
ROM checker
RAM checker
Reserved
Routine places TX and RX halves of a time slot into inactive loopback
Places TX and RX halves of a time slot into inactive routine
Routine for copying values in channel coefficient table 0 to all 16-channel tables
Approximate location of HDS code
Checksum for ROM 0x0000 : 0x07FF
Checksum for ROM 0x0800 : 0x0FFD
Call progress tone generation start
Call progress tone generation during operation
Call progress tone generator initialization
Sine-wave look-up table
Caller ID generation start
Caller ID generation during operation, TX path
Caller ID generation during operation, RX path
Caller ID generator initialization
DTMF detector start
DTMF detector during operation subroutine
DTMF detector during operation subroutine
DTMF detector initialization
Extended receive path active routine
Extended receive path active without reading from the system interface
Extended transmit path inactive/loopback routine
Extended transmit path inactive routine
Extended receive path inactive with data loopback
Extended receive path inactive routine
Reserved
Not used
(continued)
Memory Contents
Codec Chip Set
41