参数资料
型号: PM4541
厂商: PMC-Sierra, Inc.
英文描述: T1XC EVALUATION DAUGHTER BOARD
中文描述: T1XC评价子板
文件页数: 22/46页
文件大小: 520K
代理商: PM4541
TELECOM STANDARD PRODUCT
PMC-Sierra, Inc.
PM4541 T1XC-EVBD
PMC-920314
ISSUE 2
T1XC EVALUATION DAUGHTERBOARD
19
Switch ID
SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
Label
MS0
MS1
MS2
MS3
ENC2
Mapping
MS0 (Mode Select '0')
MS1 (Mode Select '1')
MS2 (Mode Select '2')
MS3 (Mode Select '3')
ENC20 (Active high enable control for pins
C2O and C2OB )
ENCV (Active high enable control for pins
CV and CVB )
ENC40 (Active high enable control for pins
C4O and C4OB )
Unused
SW1-6
ENCV
SW1-7
ENC4
SW1-8
Setting these switches selects the operating mode for the MT8940, as described below:
Mode #
0
MS[0:3]
0000
DPLL #1 Operating Mode
Normal Mode:
DPLL #2 Operating Mode
Externally applied 4.096
MHz. clock and 8 kHz.
frame pulse, properly phase
related, are used to
generate the 2.048 MHz
output clock.
Normal Mode:
Generates the 1.544 MHz
T1 clock synchronized to
the falling edge of the input
framing pulse.
Normal Mode
1
0001
Operates as above.
Generates the CEPT (ST-
BUS) timing signals locked
to the 8 kHz input signal
(C8KB)
Externally applied 4.096
MHz. clock is used to
generate the 2.048 MHz
output clock and 8 kHz
frame pulse.
Normal Mode
2
0010
Normal Mode
Operates as above.
3
0011
DEFAULT
CONFIG
Normal Mode
Operates as above.
Generates the CEPT (ST-
BUS) timing signals locked
to the 8 kHz input signal
(C8KB)
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