MC145574APB Freescale Semiconductor, MC145574APB Datasheet - Page 104

• Manufacturer Part Number: MC145574APB
• Description: IC TRANSCEIVER ISDN 32-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC145574APB

• 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: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Protocol: -
• Lead Free Status / Rohs Status: Not Compliant

12–2
12.4
MULTIFRAME INTERRUPTS IN AN NT-CONFIGURED MC145574
The NT will generate an interrupt either once every multiframe, or only in the event of a new Q channel
nibble having been received. A new Q channel nibble is defined as one which differs from the previous
Q nibble.
Table 12–2 illustrates how to configure an NT for either of these options.
Interrupt Every
Frame No.
Multiframe
BR3(2)
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
1
2
X
0
1
Table 12–1. S Channel Data Transmission
Fa Bit Position
NT to TE
Table 12–2. Multiframe Interrupts
Enable Multiframing
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
MC145574
Interrupt
NR4(2)
0
1
1
NT to TE
M Bit
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
Multiframing never causes an interrupt
An interrupt is generated on the reception of a
new Q Channel nibble
An interrupt is generated every multiframe
NT to TE
SC1.1
SC2.1
SC3.1
SC4.1
SC5.1
SC1.2
SC2.2
SC3.2
SC4.2
SC5.2
SC1.3
SC2.3
SC3.3
SC4.3
SC5.3
SC1.4
SC2.4
SC3.4
SC4.4
SC5.4
SC1.1
SC2.1
S Bit
MC145574
IRQ
Fa Bit Position
TE to NT
Q1
Q2
Q3
Q4
Q1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
MOTOROLA