peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 271

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

Semiconductor Group
5.1.1.4.2
Access: read/write
Reset value: FF
BNF7…0
5.1.1.4.3
Access: read/write
Reset value: 00
OFD9…2
bit 7
bit 7
OFD9
BNF7
Bit Number per PCM-Frame (PBNR)
PCM-Offset Downstream Register (POFD)
Bit Number per PCM Frame.
PCM-mode 0: BNF7…0 = number of bits – 1
PCM-mode 1: BNF7…0 = (number of bits – 2) / 2
PCM-mode 2: BNF7…0 = (number of bits – 4) / 4
PCM-mode 3: BNF7…0 = (number of bits – 2) / 2
The value programmed in PBNR is also used to check the PFS-period.
Offset Downstream bit 9…2.
These bits together with PCSR:OFD1…0 determine the offset of the
PCM-frame in downstream direction. The following formulas apply for
calculating the required register value. BND is the bit number in downstream
direction marked by the rising internal PFS-edge. BPF denotes the actual
number of bits constituting a frame.
PCM-mode 0:
PCM-mode 1,3: PFD9…1 = mod
PCM-mode 2:
OFD8
BNF6
H
H
OFD7
BNF5
OFD9…2 = mod
PCSR:OFD1..0 = 0
PCSR: PFD0 = 0
OFD9…0 = mod
OFD6
BNF4
5-28
OFD5
BNF3
BPF
BPF
BPF
(BND − 33 + BPF)
(BND – 17 + BPF)
(BND − 65 + BPF)
OFD4
BNF2
Description of Registers
OFD3
BNF1
PEB 20560
bit 0
bit 0
OFD2
BNF0
2003-08