參數(shù)資料
型號(hào): MT90812
廠商: Mitel Networks Corporation
英文描述: Integrated Digital Switch (IDX)(集成數(shù)字開(kāi)關(guān))
中文描述: 綜合數(shù)字交換機(jī)(IDX的)(集成數(shù)字開(kāi)關(guān))
文件頁(yè)數(shù): 74/105頁(yè)
文件大小: 334K
代理商: MT90812
MT90812
Advance Information
70
22.27
HRA CTRL Register 1(HC1)
The register is configured as follows:
Read/Write Address is: 50
H
Reset Value is: 01
H
Bit
Name
Description
7
SFLAG
Software Controlled Flag Detect (SFLAG)
. SFLAG is used to allow the system to
inject a flag (indicating that a peripheral request-to-send has been detected). This bit
can be written asynchronously, has exactly the same effect as the normal flag
generated by the Auto-hunt circuitry, and is cleared automatically by the RX circuitry
when it has been used. On reset, this bit is cleared.
6
PRXSEL
Present Receive Channel Select (PRXSEL)
. Normally low. This bit is set high if the
receive channel is to be selected via DRXi; unlike DDRX, however, CTS is not
disabled and RXCHNL and RXACT are not held high. Instead, the receiver can be
exercised by manipulating SREOP and SFLAG in a manner similar to normal
multiplexed operation. Primarily intended as a test mode. On reset, this bit is cleared.
5-4
-
Unused
.
3
EN
ENABLE HRA
. If 0, disables HRA block. If 1 the HRA block is enabled.
2
CD
0 = D before C-Channel. The D-channel is transferred before the C-channel following
the Frame Pulse. The D-channels are located in the first 16 of the 32 channels of STi/
o1 stream.
1 = C before D-Channel. The C-channel is transferred before the D-channel following
the Frame Pulse. The D-channels are located in channels 16-31 of STi/o1 stream.
1-0
BRSEL1-0
Baud Rate Select
. The Baud Rate Select field controls the number of bit times
actually used for D-channel activity within a selected transmit or receive channel time.
It also controls the rate at which the Auto-hunt circuitry monitors peripherals for
request-to-sends. During inactive bit times within an active channel, idles are
generated and output. One active bit gives a baud rate of 8K, while eight active bits
gives a baud rate of 64K.
00 8K
01 16K
10 64K
11 Unused.
On reset, 16K baud rate will be selected.
7
6
5
4
3
2
1
0
PRXSEL
CD
BRSEL1
BRSEL0
SFLAG
-
-
EN
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