PSF21150 INFINEON [Infineon Technologies AG], PSF21150 Datasheet - Page 53

• Manufacturer Part Number: PSF21150
• Description: IPAC-X ISDN PC ADAPTER CIRCUIT
• Manufacturer: INFINEON [Infineon Technologies AG]

3.3.2
According to ITU recommendation I.430 a multi-frame provides extra layer 1 capacity in
the TE-to-NT direction by using an extra channel between the TE and NT (Q-channel).
The Q bits are defined to be the bits in the F
In the NT-to-TE direction the S-channel bits are used for information transmission. One
S channel (S1) out of five possible S-channels can be accessed by the IPAC-X.
In the NT-to-TE direction the S-channel bits are used for information transmission.
The S and Q channels are accessed via the µC interface or the IOM-2 MONITOR
channel, respectively, by reading/writing the SQR or SQX bits in the S/Q channel
registers (SQRRx, SQXRx).
Table 8
Table 8
Frame Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
Data Sheet
shows the S and Q bit positions within the multi-frame.
S/T-Interface Multiframing
S/Q-Bit Position Identification and Multi-Frame Structure
NT-to-TE
F
ONE
ZERO
ZERO
ZERO
ZERO
ONE
ZERO
ZERO
ZERO
ZERO
ONE
ZERO
ZERO
ZERO
ZERO
ONE
ZERO
ZERO
ZERO
ZERO
ONE
ZERO
A
Bit Position
NT-to-TE
M Bit
ONE
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ZERO
ONE
ZERO
53
A
bit position.
Description of Functional Blocks
NT-to-TE
S Bit
S11
S21
S31
S41
S51
S12
S22
S32
S42
S52
S13
S23
S33
S43
S53
S14
S24
S34
S44
S54
S11
S21
TE-to-NT
F
Q1
ZERO
ZERO
ZERO
ZERO
Q2
ZERO
ZERO
ZERO
ZERO
Q3
ZERO
ZERO
ZERO
ZERO
Q4
ZERO
ZERO
ZERO
ZERO
Q1
ZERO
A
Bit Position
PSB 21150
PSF 21150
2000-07-21