MC145572PB Freescale Semiconductor, MC145572PB Datasheet - Page 112

• Manufacturer Part Number: MC145572PB
• Manufacturer: Freescale Semiconductor

Specifications of MC145572PB

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Not Compliant

6–2
6.2
Time
T0
T0
T1
T2
T3
T4
T5
T6
T7
4 ms
ACTIVATION SIGNALS FOR NT MODE
When configured as an NT, the MC145572 U–interface transceiver can transmit any of the signals
shown in Table 6–1. The actual procedure undertaken by the device using these five signals is de-
scribed later in this chapter. Section 4.4.9 describes how to control the transmit framer when it is
desired to generate signals for test purposes.
Information
Station
NT --> NETWORK (LT)
NETWORK (LT) --> NT
SN0
SN1
SN2
SN3
FRAMES
TN
Description of Event or State
RESET state.
Network and NT are awake.
NT discontinues transmission, indicating that NT is ready to receive signal.
Network responds to termination of signal and begins transmitting signal toward NT.
Network begins transmitting SL2 toward NT, indicating that the network is ready to receive SN2.
NT begins transmitting SN2 toward the network, indicating that NT has acquired SW frame and detected SL2.
NT has acquired superframe marker, and is fully operational.
Network has acquired superframe marker, and is fully operational.
TL
2
Figure 6–1. ANSI U–Interface Transceiver Activation State Diagram
FRAMES
TN
6
A 10 kHz tone consisting of alternating four + 3 quats followed by four – 3 quats for a time period of six
frames.
No signal transmitted.
Synchronization word present, no Superframe Synchronization word (ISW), and 2B+D+M = 1.
Synchronization word present, no Superframe Synchronization word (ISW), and 2B+D+M = 1.
Synchronization word present, Superframe Synchronization word (ISW) present. M channel bits active.
Transmitted 2B+D data operational when M4 act bit = 1. When M4 act = 0, transmitted 2B+D data = 1.
Freescale Semiconductor, Inc.
T1
For More Information On This Product,
A
(OPTIONAL)
SN1
Table 6–1. NT Mode Activation Signals
Go to: www.freescale.com
T2
T3
MC145572
SL1 (OPTIONAL)
B
480 ms
T4
Description
A
A
B
B
C
C
D
D
150 ms FOR WARM START
10 s FOR COLD START
150 ms FOR WARM START
5 s FOR COLD START
T5
C
SN2
SL2
T6
SN3
D
MOTOROLA
T7
SL3