peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 104

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
2.4
An output signal (CHI), as one additional line to the IOM-2 interface, indicates when the
fourth byte (byte 3) of each subframe comes. This byte carries 2 D-bits, 4 C/I-bits, MR
and MX-bits or 6 C/I- and 2 M-bits in every IOM-2 subframe.
• CHI signal is programmable
• The CHI signal may be activated or masked during the fourth byte of each subframe
• Four 8 bits registers control the CHI line
• Every bit in the CHI control register controls one subframe in IOM-2 frame
• After reset chi is masked until control register programmed.
Figure 2-32 CHI Signal
2.4.1
Address 323
reset value 00
bit
VMODR
CHIA - flag for CHI logic activation (‘0’-CHI logic is inactive/‘1’-CHI logic is active)
CFI Mode 0: 32 TS with 8 subframes
CFI Mode 1: 64 TS with 16 subframes
CFI Mode 2: 128 TS with 32 subframes
7
Channel Indication Logic (CHI)
CHI Configuration Register (VMODR)
IOM -2 Line-Card Mode 2.048 Mbit/s
8
CHI
unused
IOM
H
H
R
0
R
Channels
DCL = 2 x or 1 x data rate
DCL = 1 x data rate
DCL = 1 x data rate.
6
unused
1
5
2
unused
3
4
unused
B1
2-58
8
0 1 2 3
B2
4
8
3
unused
MON
8
8 bits in one 8-bit register
16 bits in two 8-bit registers
32 bits in four 8-bit registers
5
Functional Block Description
D
2
8
2
CHIA
C/I
4
6
MR MX
1 1
1
MOD1
ITD10086
7
PEB 20560
0
MOD0
2003-08