peb2035 ETC-unknow, peb2035 Datasheet - Page 63

• Manufacturer Part Number: peb2035
• Description: Communications Advanced Cmos Frame Aligner
• Manufacturer: ETC-unknow

RREQ bit EMOD.EDMA = ‘0’: at the end of the first read access to stack RSIG (rising edge of
Both requests may be triggered at the same time. The sequence of service is determined by the
user.
Figure 16
Connection to a DMA Controller
d. Access via Microprocessor
In principle, the use of the microprocessor for signaling tasks is similar to memory-to-memory DMA
applications. The request signals RREQ and XREQ indicate the meaning of interrupt requests.
Additionally, in PCM 24 mode the possibility exists to use FS/DL bits for carrying signaling
information. In this case, the signals RMFB and XMFB are used as interrupt requests.
Acknowledging is done by programming the two interrupt acknowledge bits XFDL.RMAK and
XFDL.XMAK.
Semiconductor Group
RDQ).
bit EMOD.EDMA = ‘1’: with the beginning of the second (PCM 30) or third (PCM 24) read
access to stack RSIG (falling edge of RDQ).
This stack is addressed by
1. address ‘7’ and a read command (memory-to-memory DMA transfer)
2. signal: ACKNLQ and read command (I/O-to-memory DMA transfer)
:
PCM 24 only
PEB 2035
ACFA
RMFB
XMFB
RDO
ACKNLQ
XDI
1 =
63
RREQ
XREQ
Controller
DMA
PEB 2045
P
ITS03586
MTSC
-Bus
SYPQ
PEB 2035