Panasonic KX-NCP1290CJ (serv.man2) Service Manual ▷ View online
9
KX-NCP1290CJ
3.2.3.
Local Highway Interface Function
This card has the local highway at 2.048Mbps rate and local TSW in order to switch the talk channel (Bch), which is extracted
from ISDN primary rate by PRI-IC (IC301), to H.100 interface. (ASIC (IC2) internal module)
Also, the highway assignment is different for that the number of Bch differs in 2.048M system and 1.544M system. Shows the
highway timing.
For more information, see the ASIC (IC2) specification and PRI-IC (IC301) databook.
from ISDN primary rate by PRI-IC (IC301), to H.100 interface. (ASIC (IC2) internal module)
Also, the highway assignment is different for that the number of Bch differs in 2.048M system and 1.544M system. Shows the
highway timing.
For more information, see the ASIC (IC2) specification and PRI-IC (IC301) databook.
Highway timing
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KX-NCP1290CJ
3.2.4.
EC Bus Interface
3.2.4.1.
Dual Port RAM (DPRAM) Communication
This card transmits and receives data between itself and MPR (EC bus) in a dual port RAM communication basically.
Shows the diagrammic illustration.
Shows the diagrammic illustration.
DPRAM Communication diagrammic illustration
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KX-NCP1290CJ
3.2.5.
Outline of Reset System
3.2.5.1.
Reset Operation
A reset to CPU (and the device under the control of CPU) in this card is dominant in a reset from the main frame (MPR), and
normally it is only available for software command reset or hardware reset using ASIC (IC2) from MPR. The power on reset cir-
cuit in this card is for the reset of ASIC in a hot plug
Shows the reset class of PRI23/PRI30 card, and shows the reset schematic diagram
normally it is only available for software command reset or hardware reset using ASIC (IC2) from MPR. The power on reset cir-
cuit in this card is for the reset of ASIC in a hot plug
Shows the reset class of PRI23/PRI30 card, and shows the reset schematic diagram
Reset Class
A reset schematic diagram
Reset Type
The way of Reset
Specification
Reset to ASIC (IC2)
OR condition of the following Reset
L active
Power on reset
Reset by the reset IC
Reset IC specifications
Power Supply voltage: 3.3V
Reset voltage: 2.9V
Reset delay time: 50msec
Reset IC specifications
Power Supply voltage: 3.3V
Reset voltage: 2.9V
Reset delay time: 50msec
Over 10msec
Hardware reset from the EC bus
Reset by EC_RST
Over 10msec
Software reset from the EC bus
Cancel after a given length of time
16cycles after EC_CLK about 2usec
Reset to CPU (IC1)
Software reset from the EC bus
ASIC local reset register control
L active Over 10msec (up to stable
PLL)
PLL)
Reset to Flash
Software reset from the EC bus
Same as the reset to LPR
L active Over 500nsec
Reset to PRI_IC (IC301)
Software reset from the LPR
ASIC port P2[0] control
L active Over 20
µmsec
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KX-NCP1290CJ
3.2.6.
Power Supply
This card is supplied +15V power through the backboard connector (90pin) from the power supply unit.
The +15V power supply generates +3.3V via DC/DC converter, and they are fed as the power of circuit in the card.
The +40V power supply is not used due to no feeding to the line.
Shows the system diagram of the power supply.
The +15V power supply generates +3.3V via DC/DC converter, and they are fed as the power of circuit in the card.
The +40V power supply is not used due to no feeding to the line.
Shows the system diagram of the power supply.
System diagram of the power supply
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