參數(shù)資料
型號(hào)： MT8931C
廠商： Zarlink Semiconductor Inc.
英文描述： Subscriber Network Interface Circuit
中文描述： 用戶網(wǎng)絡(luò)接口電路
文件頁數(shù)： 21/39頁
文件大?。?/td> 833K
代理商： MT8931C
Data Sheet
MT8931C
21
Table 11. HDLC Address Recognition Register 1 (Read/Write Add. 00110
B
)
Table 12. HDLC Address Recognition Register 2 (Read/Write Add. 00111
B
)
Table 13. NT Mode C-channel Control Register
(2)
(Write Add. 01000
B
and B0 = 0)
Note 1:
Note 2:
Allow one ST-BUS frame to input the C-channel and one ST-BUS frame to establish the connection.
The C-channel Control Register is updated once every ST-BUS frame. Therefore, this register should not be written to
more than once per frame, otherwise, the last access will override previous ones.
BIT
NAME
DESCRIPTION
B7-B2
R1A7-R1A2 A six bit mask used to interrogate the first byte of the received address (where B7 is MSB).
If address recognition is enabled, any packet failing the address comparison will not be
stored in the Rx FIFO.
B1
NA
Not applicable to address recognition.
B0
A1En
If ’0’, the first byte of the address field will not be used during address recognition.
If ’1’ and the address recognition is enabled, the six most significant bits of the first
address byte will be compared with the first six bits of this register.
BIT
NAME
DESCRIPTION
B7-B1
R2A7-R2A1 A seven bit mask used to interrogate the second byte of the received address (where B7
is MSB). If address recognition is enabled, any packet failing the address comparison will
not be stored in the Rx FIFO. This mask is ignored if the address is a Broadcast (i.e., R2A
= 1111111).
B0
A2En
If ’0’, the second byte of the address field will not be used during address recognition.
If ’1’ and the address recognition is enabled, the seven most significant bits of the second
address byte will be compared with the first seven bits of this register.
BIT
NAME
DESCRIPTION
B7
AR
Setting this bit will initiate the activation of the S-Bus.
If ’0’, the device will remain in the present state.
B6
DR
Setting this bit will initiate the deactivation of the S-Bus.
If ’0’, the device will remain in the present state. This bit has priority over AR.
B5
DinB
If ’1’, the D-channel will be placed in the B1 timeslot allocating 64 kbit/s to the
D-channel.
(1)
If ’0’, the D-channel will assume its position with a 16 kbit/s bandwidth.(1)
B4
Timing
A ’0’ will set the NT in a short passive bus configuration using a fixed timing source (no
compensation for line length).
A ’1’ will set the NT in a point-to-point or extended passive bus configuration with adaptive
timing compensation.
B3
M/S
This bit represents the state of the transmitted M/S-bit. M when HALF=0 and S when
HALF=1.
B2
HALF
The state of this bit identifies which half of the frame will be transmitted on the
S-Bus. The operation of this signal is similar to that of the HALF pin.
B1
TxMFR
A ’1’ in this bit, while HALF = 0, will force the transmission of a multiframe sequence in the
Fa and N bits, i.e., Fa=1 and N=0. A ‘0’ will resume normal operation, i.e., Fa=0 and N=1.
B0
RegSel
If the register select bit is set to ’1’, the control register is redefined as the diagnostic
register. A ’0’ give access to the control register.
相關(guān)PDF資料
PDF描述
MT8931CE Subscriber Network Interface Circuit
MT8931CP Subscriber Network Interface Circuit
MT8931C-1 CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit
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MT8931C CMOS ST-BUS⑩ FAMILY Subscriber Network Interface Circuit Preliminary Information
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MT8931CE 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Network Interface Circuit
MT8931CP 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Subscriber Network Interface Circuit
MT8940 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO-CMOS ST-BUS⑩ FAMILY T1/CEPT Digital Trunk PLL
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