pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 216

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

Figure 67
ELIC
CFI Clock Source Prescaler CMD1:CSP1 … 0
The CFI clock source PDC (CMD1:CSS = 0) or DCL (CMD1:CSS = 1) can be divided by
a factor of 1, 1.5 or 2 in order to obtain the CFI reference clock CRCL (see table 32).
Note that in CFI mode 2, the frequency of RCL is only half the CFI data rate.
Table 32
Prescaler Divisors
CSP1
0
0
1
1
Semiconductor Group
DCL
FSC
®
Clock Sources for the CFI and PCM Interfaces if CMD1:CSS = 1
C
F
I
Bit Shift
CTAR
CBSR : CDS2...0
CFI Frame Sync.
CFI Data Rate
÷1.5
÷2
CMD : CSP1, 0
M
U
X
CRCL
CSP0
0
1
0
1
÷4
÷2
÷2
CFI Mode
CFI Mode
0
3
0
3
2
1
2
1
ELIC
216
Internal Reference
Clock (RCL)
R
Bit Shift
POFU
POFD
PCSR
Prescaler Divisor
2
1.5
1
not allowed
PCM Frame Sync.
PCM Data Rate
PMOD : PCR
M
U
X
Application Hints
÷2
PEB 20550
PEF 20550
ITS08046
P
C
M
PDC
PFS
01.96