欢迎访问ic37.com |
会员登录 免费注册
发布采购

MT9079 参数 Datasheet PDF下载

MT9079图片预览
型号: MT9079
PDF下载: 下载PDF文件 查看货源
内容描述: CMOS ST- BUS⑩系列高级控制器E1 [CMOS ST-BUS? FAMILY Advanced Controller for E1]
分类和应用: 控制器
文件页数/大小: 54 页 / 569 K
品牌: MITEL [ MITEL NETWORKS CORPORATION ]
 浏览型号MT9079的Datasheet PDF文件第14页浏览型号MT9079的Datasheet PDF文件第15页浏览型号MT9079的Datasheet PDF文件第16页浏览型号MT9079的Datasheet PDF文件第17页浏览型号MT9079的Datasheet PDF文件第19页浏览型号MT9079的Datasheet PDF文件第20页浏览型号MT9079的Datasheet PDF文件第21页浏览型号MT9079的Datasheet PDF文件第22页  
MT9079  
Circular Buffers  
(CDW) and Detect Word Mask (CDM) mentioned  
below.  
The MT9079 is equipped with two 16 byte circular  
receive buffers and two 16 byte circular transmit  
buffers, which can be connected to any PCM 30 time  
slot. Connection is made through control bits 3 to 0  
of the per time slot control words on pages 7 and 8.  
These buffers will transmit and receive time slot data  
synchronously with the CRC-4 multiframe.  
b) START - once activated, receive circular buffer 0  
or 1 begins recording time-slot data and initiates an  
interrupt when a user-defined eight bit pattern is  
received. This user-defined bit pattern is determined  
by the Code Detect Word (CDW) and Detect Word  
Mask (CDM) mentioned below.  
Transmit circular buffer zero is located on page 9  
(TxB0.0 to TxB0.15) and transmit circular buffer one  
is located on page 10 (TxB1.0 to TxB1.15).  
The functionality and control of the START and  
STOP interrupts is described in Table 6.  
PCM 30 Time-Slot Code Insertion and Detection  
The two circular 16 byte receive buffers (page 11 -  
RxB0.0 to RxB0.15 and page 12 - RxB1.0 to  
RxB1.15) record the data received in an associated  
channel for the next 16 frames beginning with the  
CRC-4 multiframe boundary. The assigned channel  
data from the next multiframe will over-write the  
current data until the buffer is disconnected.  
Idle line codes, flags or user-defined codes can be  
inserted and detected on any combination of PCM 30  
time-slots. This is done as follows:  
a) CIW7-0 - Code Insert Word 7 to 0 (page 1, address  
17H) is an eight bit code that is transmitted on  
user-defined PCM 30 time-slots. Transmit time-slots  
are selected through bit 7 of the per time slot control  
words (pages 7 and 8).  
The STOP and START maskable interrupts extend  
the normal operation of the receive buffers in the  
following manner.  
b) CDW7-0 - Code Detect Word 7 to 0 (page 1,  
address 18H) is an eight bit code, which is compared  
with the contents of user-defined PCM 30 receive  
time-slots. When the contents of the selected channels  
matches the CDW7-0 the DATA interrupt, if unmasked,  
will be triggered. Receive time-slots are selected  
a) STOP - once activated, receive circular buffer 0 or  
1 records time-slot data until that data either  
matches or mismatches a user-defined eight bit  
pattern, then the interrupt occurs. This user-defined  
bit pattern is determined by the Code Detect Word  
Interrupt  
Mask  
Function*  
(note 3)  
Description (see notes 1 and 2)  
STOP  
(page 1,  
address  
STOP0  
STOP1  
STOP0  
Circular buffer zero stops recording on a match with CDW and CDM.  
Circular buffer one stops recording on a match with CDW and CDM.  
1EH, bit 2)  
Circular buffer zero stops recording on a mismatch with CDW and  
CDM.  
STOP1  
Circular buffer one stops recording on a mismatch with CDW and  
CDM.  
START  
(page 1,  
address  
START0  
START1  
START0  
Circular buffer zero starts recording on a match with CDW and CDM.  
Circular buffer one starts recording on a match with CDW and CDM.  
1EH, bit 1)  
Circular buffer zero starts recording on a mismatch with CDW and  
CDM.  
START1  
Circular buffer one starts recording on a mismatch with CDW and  
CDM.  
Table 6 - START and STOP Interrupt Control  
Notes:  
1) The interrupt vector value associated with these interrupts is 02H (page 4, address 12H)  
2) The START and STOP interrupts can be used to record the data between two pre-defined eight bit data patterns received in a  
particular pattern.  
3) Circular Buffer Accumulate Control Word (page 2, address 12H).  
4-254  
 复制成功!