PEB 20550
PEF 20550
Operational Description
Semiconductor Group
114
01.96
3.8.6.1 EPIC
-1 Initialization Example
Configure PCM-side of ELIC:
Write
PMOD = 44
H
PCM-mode 1, single clock rate, PFS evaluated with falling
edge of PDC, R
×
D0 = logical input port 0
512 bits per PCM-frame
the internal PFS marks downstream bit 6, ts 0 (second bit
of frame)
the internal PFS marks upstream bit 6, ts 0 (second bit
of frame)
no clock shift; PCM-data sampled with falling, transmitted
with rising PDC
Configure CFI-side of ELIC:
Write
CMD1 = 20
H
PDC and PFS used as clock and framing source for the
CFI; CRCL = PDC; CFI-mode 0
Write
CMD2 = D0
H
FSC shaped for IOM-2 interface; DCL = 2
×
data rate;
CFI-data received with falling, transmitted with rising CRCL
Write
CBNR = FF
H
256 bits per CFI-frame
Write
CTAR = 02
H
PFS is to mark CFI time slot 0
Write
CBSR = 20
H
PFS is to mark bit 7 of CFI time slot 0; no shift of
CFI-upstream data relative to CFI-downstream data
Write
CSCR = 00
H
2-bit channels located in position 7, 6 on all CFI-ports
Reset EPIC-1 Control Memory (CM) to FF
H
:
Write
MADR = FF
H
Write
MACR = 70
H
Initialize EPIC-1 CM:
Write
OMDR = 80
H
set EPIC-1 from CM-reset mode into CM-initialization mode
The subscriber’s upstream B
1
-channel is switched to PCM-port 0, time slot 5
Write
MADR = 89
H
connection to PCM-port 0, time slot 5
Write
MAAR = 80
H
from upstream CFI-port 0, time slot 0
Write
MACR = 71
H
write CM-data adressed by MAAR with content of MADR;
write CM-code addressed by MAAR with '0001'
B
(code for a
simple 64-kbit/s connection)
Read
STAR
Wait for STAR:MAC = 0
The subscriber’s upstream B
2
-channel is internally looped via PCM-port 1, time slot 1
Write
MADR = 85
H
loop to PCM-port 1, time slot 1
Write
MAAR = 81
H
from upstream CFI-port 0, time slot 1
Write
MACR = 71
H
write CM-data addressed by MAAR with content of MADR;
write CM-code addressed by MAAR with '0001'
B
(code for a
simple 64 kbit/s connection)
Read
STAR
Wait for STAR:MAC = 0
Write
Write
PBNR = FF
H
POFD = F0
H
Write
POFU = 18
H
Write
PCSR = 45
H