參數(shù)資料
型號(hào)： AM79C30A
廠商： Advanced Micro Devices, Inc.
英文描述： Digital Subscriber Controller⑩ (DSC⑩) Circuit
中文描述： 數(shù)字用戶控制器⑩法（DSC⑩）電路
文件頁數(shù)： 21/101頁
文件大?。?/td> 1607K
代理商： AM79C30A
Am79C30A/32A Data Sheet
21
Multiframe S-bit/Status Buffer (MFSB), Read Only
Address = Indirect A7H
The MFSB reset default value is 40H.
Multiframe Q-bit Buffer (MFQB), Write Only
Address = Indirect A8H
Multiplexer (MUX)
The MUX contains the registers found in Table 17.
The Multiplexer is used to selectively route 64-Kbit/s
full-duplex B channels between the LIU (Line Interface
Unit), MAP (Main Audio Processor), MPI (Microproces-
sor Interface), and the PP (Peripheral Port).
The logical channels available at the MUX are shown in
Figure 2, They are:
1. From/to the LIU channels B1 and B2
2. From/to the MAP channel Ba
3. From/to the MPI channels Bb and Bc
4. From/to the PP channels Bd, Be, and Bf
For any specific application, the MUX can be pro-
grammed by the microprocessor to route any three
B-channel ports to any other three B-channel
ports.Programmable bidirectional bit reversal is pro-
vided for both of the MPI data channels Bb and Bc.
MUX Control Registers 1, 2, and 3
(MCR1, MCR2, and MCR3), Read/Write
Addresses = Indirect 41H, 42H, 43H
The MUX can support three bidirectional paths. The
contents of the MUX Control Registers MCR1, MCR2,
and MCR3 direct the flow of data between the eight
MUX logical B channels (see Figure 2). These three
MCRs are programmed to connect any two B-channel
ports together by writing the appropriate channel code
into an MCR. These MCRs have the same format,
where bits 7–4 indicate port 1 and bits 3–0 indicate port
2. In each of these three MCR registers, the channel
codes found in Table 18 are used for both ports 1 and 2.
For example, to connect B1(LIU) with Bb (MPI) and B2 (LIU)
with Ba (MAP), the contents of the MCRs would be:
Table 15.
Multiframe S-Bit/Status Buffer
Bit Description
Generates Interrupt
0
S1
No
1
S2
No
2
S3
No
3
S4
No
4
S5
No
5
S-data available
If MF bit 1 = 1
6
Q-bit buffer empty
If MF bit 2 = 1
7
Multiframe change of state If MF bit 3 = 1
Table 16.
Multiframe Q-Bit Buffer
Bit
Description
0
Q1 (default = 1)
1
Q2 (default = 1)
2
Q3 (default = 1)
3
Q4 (default = 1)
4
Q-bit value when multiframing enabled but
synchronization not achieved (default = 0)
5, 6, 7
Not used
Table 17.
MUX Registers
Register
No./Registers
Mnemonic
MUX Control
Registers
4
MCR1, MCR2, MCR3,
MCR4
Table 18.
MCR Register Channel Codes
Code
Channel
0000
No connection (default value)
0001
B1 (LIU)
0010
B2 (LIU)
0011
Ba (MAP)
0100
Bb (MPI)
0101
Bc (MPI)
0110
Bd (PP channel 1)
0111
Be (PP channel 2)
1000
Bf (PP channel 3)
Port 1
Port 2
Register 7 6 5 4 3 2 1 0 Channel Connection
MCR1
0 0 0 1 0 1 0 0 B1 (LIU)
Bb (MPI)
MCR2
0 0 1 0 0 0 1 1 B2 (LIU)
Ba (MAP)
MCR3
0 0 0 0 0 0 0 0 No connect
No connect
相關(guān)PDF資料
PDF描述
AM79C30AJC Digital Subscriber Controller⑩ (DSC⑩) Circuit
AM79C30AVC Digital Subscriber Controller⑩ (DSC⑩) Circuit
AM79C32A Digital Subscriber Controller⑩ (DSC⑩) Circuit
AM79C32AJC Digital Subscriber Controller⑩ (DSC⑩) Circuit
AM79C32AVC Digital Subscriber Controller⑩ (DSC⑩) Circuit
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C30ADC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN Line Interface
AM79C30ADCB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ISDN Line Interface
AM79C30AJC 制造商:Advanced Micro Devices 功能描述: 制造商:AMD 功能描述:
AM79C30AJC/D 制造商:Rochester Electronics LLC 功能描述:- Bulk
AM79C30AJC/DTR 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*