參數(shù)資料
型號： LM4560
廠商： National Semiconductor Corporation
英文描述： Advanced PCI Audio Accelerator
中文描述： 先進的PCI音頻加速器
文件頁數(shù)： 24/54頁
文件大小： 380K
代理商： LM4560
3.0 Register Description
(Continued)
A ‘1’ written to bit n will reset this bit.
3.4.9.8 EINT (Envelope Engine Interrupt Eegister) (for
Bank A only)
Address:
AudioBase + 9Ch
Size:
32 bits
Type:
Read/Write
Default:
00000000h
Any bits toggled from ‘0’ to ‘1’ will result in a IRQ.
Reading from this I/O port will return the envelope INT status
of 32 channels of Bank A. Bit n is for channel n.
0: No INT
1: INT
This bit will be set in 2 cases:
When envelope buffer toggled, and ETOG_IE ( envelope
toggle INT enable bit in Global Control register ) =1.
When Ec (current envelope)
≤
FFFh (63.984375 dB), and
EDROP_IE (envelope dropping to 63.984375 dB INT en-
able bit in Global Control register) =1.
Writing ‘1’ to bit n of this register will reset this bit.
0: Ignore.
A ‘0’ written to bit n will not change the status of this bit.
1: reset
A ‘1’ written to bit n will reset this bit.
3.4.9.9 GC & CIR (Global Control & Channel Index)
Address:
AudioBase + A0h
Size:
32 bits
Type:
Read/Write
Default:
00000000h
Bits 31–30 are used to control Legacy Recording channel
when record to mono sample.
00: left
01: right
10: (left+right+1)/2
11: reserved.
Bits 29–28 are IO 0008-read handling control bits.
00: never assert StatusRDY
01: StatusRDY = DMATCReached
10: StatusRDY = DMATCReached | LegacyDRQ
11: in this case, handshaking with StatusWR and manipula-
tion of return byte should been done.
StatusRDY keep ‘0’ when initialization.
If(StatusWR == 1) {
StatusRDY = 1;
if(DMAChannel==0) {
ReturnByte[7:0]=
{InputByte[7:5], DMAR8[4], InputByte[3:1], DMAR8[0]};
}
else {
ReturnByte[7:0] =
{InputByte[7:6], DMAR8[5], InputByte[4],
InputByte[3:2], DMAR8[1], InputByte[0]};
}
}
if(DMASNOOPCS_==0 & ADR[7:0] = 8 & Data_rdy_ == 0 &
StatusRDY==1)
StatusRDY = 0;
Bit 27 Test_loopback: This bit is used for wave engine loop-
back testing.
0: normal
1: force recording engine get new data from playback FIFO
instead of aclink.
Bit 26 Debugging Mode
0: Normal
1: Chip is in Debugging Mode.
In Debugging Mode, 20 pins (including 8 pins of GPIO, 1 pin
of SPDIF, 6 pins of I2S and 5 NC pins) are used as output to
monitor 40 internal important signals.
Detail in Appendix B.
Bit 25–24 EXPROM Map Mode
00: 000h–1FFh of EXPROM is mapped to AudioMemBase
800h–FFFh low 16 bits;
800h–9FFh of EXPROM is mapped to AudioMemBase
800h–FFFh high 16 bits;
01: 200h–3FFh of EXPROM is mapped to AudioMemBase
800h–FFFh low 16 bits;
A00h–BFFh of EXPROM is mapped to AudioMemBase
800h–FFFh high 16 bits;
10: 400h–5FFh of EXPROM is mapped to AudioMemBase
800h–FFFh low 16 bits;
C00h–DFFh of EXPROM is mapped to AudioMemBase
800h–FFFh high 16 bits;
11: 600h–7FFh of EXPROM is mapped to AudioMemBase
800h–FFFh low 16 bits;
E00h–FFFh of EXPROM is mapped to AudioMemBase
800h–FFFh high 16 bits.
Bit 23 EXPROM Dump Mode Enable
0: Disable
1: Enable
If enabled, EXPROM(4096x12bit) is mapped to AudioMem-
Base according to bit[25:24], i.e. the content of EXPROM
can be read out through AudioMem Read cycle.
Bit 22–21 Test mode bits
00: normal mode (chip works normally in this mode)
01: test mode 1
10: test mode 2
11: test mode 3
The detail descriptions on test mode 1, 2, and 3 are given in
Appendix B.
Bit 20 Main Mixer Output Control
0 Main Mixer L/R
→
PCM L/R Output FIFO
1 Main Mixer L/R
→
MMC L/R Output Buffer
Bit 19 S/PDIF Out Control
0 S/PDIF L/R Output Buffer
→
S/PDIF L/R transmitter
1 PCM L/R Output FIFO
→
S/PDIF L/R transmitter
Bit 18 I2S Out Control
0 I2S L/R Output Buffer
→
I2S transmitter
1 SURR L/R Output FIFO
→
I2S transmitter
Bit 17 PCMIN_B Mixing Enable/Disable
0 PCMIN_B Mixing Disable
1 PCMIN_B Mixing Enable
www.national.com
24
相關(guān)PDF資料
PDF描述
LM45BIM3 SOT-23 Precision Centigrade Temperature Sensors
LM45BIM3X SOT-23 Precision Centigrade Temperature Sensors
LM45B SOT-23 Precision Centigrade Temperature Sensors
LM4610 Dual DC Operated Tone/Volume/Balance Circuit with National 3-D Sound
LM4610N Dual DC Operated Tone/Volume/Balance Circuit with National 3-D Sound
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4560VJD 制造商:Rochester Electronics LLC 功能描述:- Bulk
LM4562 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual High Performance, High Fidelity Audio Operational Amplifier
LM4562_07 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual High Performance, High Fidelity Audio Operational Amplifier
LM4562HA 制造商:Texas Instruments 功能描述:OP Amp Dual GP ??17V 8-Pin TO-99 Tray
LM4562HA/NOPB 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*