MC145574AAC Freescale Semiconductor, MC145574AAC Datasheet - Page 88

• Manufacturer Part Number: MC145574AAC
• Description: IC TRANSCEIVER ISDN 32-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC145574AAC

• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -
• Protocol: -
• Lead Free Status / Rohs Status: Compliant

9–12
9.14
9.15
BR11(0) — Transmit 96 kHz Test Signal
This bit is a read/write bit and is applicable to both NT and TE modes of operation. When this bit
is 0, the MC145574 functions normally. When this bit is 1, the device transmits a 96 kHz square wave
test signal on TxP/TxN. This test signal can be used for test purposes. This 96 kHz test signal qualifies
as a “Transmit INFO X” state. Correspondingly, the MC145574 receiving the 96 kHz test signal will
be in the “Receive INFO X” state. Application of a hardware or software reset will reset this bit to 0.
BR12
Byte register 12 is reserved for Motorola use only.
BR13
BR13(7) — NT: NT1 Star Mode
This bit is a read/write bit and is only applicable to the NT mode of operation. When this bit is 0, the
device functions normally. When this bit is 1, the device is configured for NT1 Star mode operation.
Refer to Section 11 for a detailed description of this mode. This bit is reset to 0 by application of either
a hardware or software reset.
BR13(6)
This bit has no function and is reserved for Motorola use only.
BR13(5) — IDL2 Clock Speed (MSB)
This bit is a read/write bit and is applicable to both NT and TE modes of operation. BR13(5), in conjunc-
tion with BR7(2), determines the IDL2 CLK frequency when operating in the IDL2 master mode. BR7(2)
is the LSB and BR13(5) is the MSB. The code corresponding to each IDL2 clock frequency is as shown
in the description for BR7(2). Application of either a hardware or a software reset will reset this bit
to 0. See Table 9–3.
BR13(4) — Mute B2 on IDL2
This bit is a read/write bit and is applicable to both NT and TE modes of operation. When this bit
is 0, the device functions normally. When this bit is 1, the data transmitted on the B2 channel on IDL2
Tx will be forced to the “idle 1s” condition. This feature is primarily used in the NT1 Star mode operation.
Refer to Section 11 for a detailed description of this mode. Application of a hardware or software reset
resets this bit to 0.
BR13(3) — Mute B1 on IDL2
This bit is a read/write bit and is applicable to both NT and TE modes of operation. When this bit
is 0, the device functions normally. When this bit is 1, the data transmitted on the B1 channel on IDL2
Tx will be forced to the “idle 1s” condition. This feature is primarily used in the NT1 Star mode operation.
BR12
BR13
Star Mode
Applicable
Reserved
NT: NT1
TE: Not
(7)
(7)
TE: Not Applicable
Freescale Semiconductor, Inc.
For More Information On This Product,
Reserved
Reserved
(6)
(6)
Go to: www.freescale.com
IDL2 Clock
Reserved
MC145574
Speed
(MSB)
(5)
(5)
Mute B2 on
Reserved
IDL2 Tx
(4)
(4)
Mute B1 on
Reserved
IDL2 Tx
(3)
(3)
Channel to
Applicable
NT: Force
Reserved
TE: Not
Echo
Zero
(2)
(2)
Applicable
TE: Force
Reserved
IDL2 Tx
NT: Not
(1)
(1)
MOTOROLA
Reserved
Reserved
(0)
(0)