- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374948 > STSAM9708 (Atmel Corp.) Sound Synthesis PDF資料下載
參數(shù)資料
| 型號： | STSAM9708 |
| 廠商： | Atmel Corp. |
| 英文描述： | Sound Synthesis |
| 中文描述： | 聲音合成 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 373K |
| 代理商： | STSAM9708 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
10
ATSAM9708
1772D–DRMSD–01/04
The PDSP#1 responds on addresses 0 to 3 (A2A1A0 = 0XX), while PDSP#2 responds
on addresses 4 to 7 (A2A1A0 = 1XX).
Each PDSP parallel interface supports a byte-wide I/O interface and a 16-bit port dedi-
cated to burst transfers.
The byte-wide I/O interface is normally used to implement a MPU-401 UART-mode
compatible interface. It is specified by address A1A0 = 0X, address 00 being the data
register, address 01 being the status/control registers. Besides the standard two status
bits of the MPU-401, two additional bits are provided to expand the MPU-401 protocol.
Address A1A0 = 10 specifies a 16-bit I/O port. It is mainly used for burst audio transfers
to/from the PC using very efficient PC instructions like REP OUTSW or REP INSW
which operate at maximum ISA bus bandwidth. This port may also be used for fast pro-
gram or sound bank uploads.
DSP Cache RAM
The memory management unit (MMU) allows external ROM and/or RAM memory
resources to be shared between the two DSPs and the two P16 control processors. This
allows a single device (i.e., DRAM) to serve as sample memory storage/delay lines for
the DSPs and as program storage/data memory for the P16 control processors.
The DSP cache RAM allows a dramatic reduction in the traffic with the external
ROM/RAM, allowing use of standard 90 ns ROM parts with sampling frequencies up to
48 kHz. Average access request rate to external memory is only one for every two
frames for each slot, which gives 64 accesses per synthesis frame. The MMU can pro-
vide up to 169 memory accesses per frame, which leaves over 100 accesses free per
frame to be used by the P16 processors. This means that under full 128-voice polyph-
ony traffic conditions, each P16 instruction average execution time is around 400 ns at
48 kHz sampling frequency.
128-voice polyphony can be assured only when all samples are played at nominal fre-
quency or down-transposed. Simultaneously playing a large number of up-transposed
samples can adversely affect polyphony. For more details of possible polyphony for a
given application, please refer to the application note “ATSAM9708 Memory Manage-
ment Unit”.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| STT320 | Thyristor-Thyristor Modules |
| STT320GK08 | Thyristor-Thyristor Modules |
| STT320GK12 | Thyristor-Thyristor Modules |
| STT320GK14 | Thyristor-Thyristor Modules |
| STT320GK16 | Thyristor-Thyristor Modules |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STSB43AB22APDTG4 | 功能描述:1394 接口集成電路 OHCI 1.1 1394a Link Layer Controller RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray |
| STSB43AB23PDT | 功能描述:1394 接口集成電路 OHCI 1.1 1394a Link Layer Controller RoHS:否 制造商:Texas Instruments 類型:Link Layer Controller 工作電源電壓: 封裝 / 箱體:LQFP 封裝:Tray |
| STSBFA_Z08TNS WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ST-SBH-CES0071 | 制造商:3M Electronic Products Division 功能描述:SOFT TOOL FOR SBH-CES0071 |
| STSC09DYE1 | 制造商:FibreFab 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。