peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 291

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

Semiconductor Group
MAAR:MA7 selects between upstream and downstream CM-blocks. This information is
not required since the transfer direction is defined by CMDR (transmit or receive).
MAAR:MA0 selects between even and odd time-slots. This information is also not
required since MF-channels are always located on even time-slots.
5.1.1.4.25 Monitor/Feature Control Channel FIFO (MFFIFO)
Access: read/write
Reset value: empty
The 16-byte bi-directional MFFIFO provides intermediate storage for data bytes to be
transmitted or received over the monitor or feature control channel.
MFD7…0 MF Data bits 7…0; MFD7 (MSB) is the first bit to be sent over the serial CFI,
Note: The byte n + 1 of an n-byte transmit message in monitor channel is not defined.
5.1.1.4.26 Signaling FIFO (CIFIFO)
Access: read
Reset value: 0xxxxxxx
The 9 byte deep CIFIFO stores the addresses of CFI time-slots in which a C/I- and/or a
SIG-value change has taken place. This address information can then be used to read
the actual C/I- or SIG-value from the control memory.
SBV
SAD6…0
bit 7
bit 7
MFD7
SBV
MFD0 (LSB) the last.
Signaling Byte Valid.
0…the SAD6..0 bits are invalid.
1…the SAD6..0 bits indicate a valid subscriber address. The polarity of SBV
Subscriber Address bits 6…0; The CM-address which corresponds to the
CFI time-slot where a C/I- or SIG-value change has taken place is encoded
in these bits. For C/I-channels SAD6…0 point to an even CM-address
(C/I-value), for SIG-channels SAD6…0 point to an odd CM-address (stable
SIG-value).
MFD6
SAD6
is chosen such that the whole 8 bits of the CIFIFO can be copied to the
MAAR register in order to read the upstream C/I- or SIG-value from the
control memory.
B
MFD5
SAD5
MFD4
SAD4
5-48
MFD3
SAD3
MFD2
SAD2
Description of Registers
MFD1
SAD1
PEB 20560
bit 0
bit 0
MFD0
SAD0
2003-08