參數(shù)資料
型號： MC145574
廠商： Motorola, Inc.
英文描述： ISDN S/T-Interface Transceiver
中文描述： 綜合業(yè)務(wù)數(shù)字網(wǎng)S / T的接口收發(fā)器
文件頁數(shù)： 58/164頁
文件大?。?/td> 1072K
代理商： MC145574
MC145574
6–12
MOTOROLA
(0)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
BR15
Overlay
Register
Enabled
Rev 5
Rev 4
Rev 3
Rev 2
Rev 1
Rev 0
(7)
(6)
(5)
(4)
(3)
(2)
(1)
(0)
OR6
TSA B1
Enable
TSA B2
Enable
TSA D
Enable
Dout Open
Drain
GCI Indirect
Mode Enable
CLK1
CLK0
OR7
Disable 3 V
Regulator
Enable
S/G Bit
Enable
TCLK
Enable BCL
OR8
Disable XTAL
FIX Enable
NT Terminal
Mode Enable
Sleep
Disable
OR9
NT
Force INFO 2
Transmission
TE
T3F8 Enable T3F6 Disable
OR15
Overlay
Register
Enable
Rev 5
Rev 4
Rev 3
Rev 2
Rev 1
Rev 0
All these registers are detailed in the following sections of this document: Section 8 for the nibble
registers, Section 9 for the byte registers, and Section 10 for the overlay registers.
When configured for GCI direct mode of operation, the following register bits have different functionality
from SCP mode.
OR7(6)
This bit can be enabled only in GCI 1.536 MHz clock mode. This bit provides the availability of the
D channel on the S/T loop. “1” = Stop (no availability of the D channel) and “0” = Go (availability of
the D channel). Refer to Section 11.
Enable S/G Bit
OR8(0)
In GCI mode, the sleep mode is enabled by default. It can be disabled by writing to the register bit
(i.e., by writing a logic 1). This is opposite to operation of these bits in the SCP mode.
Sleep Disable
The command/indication (C/I) is intended to manage layer 1 procedures such as activation and deac-
tivation of the line, test loop control, and other additional control functions. C/I codes are four bits
in length and must be received for two consecutive GCI frames before they are acted upon.
The C/I channel bits are numbered bit 4 through bit 1, with bit 4 being the most significant bit. The
C/I channel command bits are transmitted starting with bit 4.
The command channel (COM) is an input to the device in the C/I channel of the GCI frame on the
Din pin.
The indicate channel (IND) is an output from the device in the GCI channel of the GCI frame on the
Dout pin.
In both the COM and IND cases, the four–bit word is continually input or output until superceded by
another C/I channel word.
The command and indicate words used by the MC145574 device are defined in Table 6–8. This table
is fully compatible with the industry standard GCI specification.
For More Information On This Product,
Go to: www.freescale.com
F
Freescale Semiconductor, Inc.
n
.
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MC145574AEG 制造商:Freescale Semiconductor 功能描述:
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