Read Panasonic KX-TDA620BX (serv.man8) Service Manual Supplement online
10
KX-TDA620 Series
Explanation of signals used in the block diagrams
Signal Name
Contents
EC_AD[15:0]
Address of EC Synchronous bus, Data Bus.
EC_CBE[1:0]
EC Bus command /Byte enable: The indicator drives as bus command in the address phase and as byte
enable in the data phase.
enable in the data phase.
EC_nCDET
EC line card detection signal: Asynchronous interrupting signal
EC_CLK
Clock of EC Synchronous Bus (8MHz) All the EC Bus signal except nRESET/EC_INT operates in sync
with signal.
with signal.
EC_FARME
EC Cycle frame signal: This indicates the drive by initiator and the execution of EC bus cycle.
EC_nINT
EC Interrupt signal: This is asserted by optional card.
EC_PAR
Parity bit of EC synchronous Bus: Drive by applying even parity to AD[15:0] and CDE[1:0].
EC_nPERR
EC parity error: Flag indicating error status by parity flag.
EC_nRST
EC Reset signal: shelf reset signal
EC_nSTOP
EC Bus Stop signal: This is asserted, when target requests transaction halt to initiator.
EC_nTRDY
EC Target ready signal: This indicates the drive by target and the possible data transfer.
CT_C8
Clock 8.192MHz clock outputted from DPLL
CT_FRAME
Frame signal: 8kHz frame signal outputted from DPLL
CT_D [7:0]
CT Data Bus: Two-way serial data bus to which the drive from any card is possible in the system.
RINGER
Ringer signal :Output square-wave of 20/25Hz as source signal of ringer.
HALT
This alarms the occurrence of the decline DC voltage to line card.
Operation halt signal sent to the option card (when the DC alarm has gone off).
Operation halt signal sent to the option card (when the DC alarm has gone off).
POWTYPE
Notification signal of the power supply type M Power Supply attached: POWTYPE[1:0]= [H, H,] L Power
Supply attached: POWTYPE[1:0]= [H, L]
Supply attached: POWTYPE[1:0]= [H, L]
LED_ALM
Control signal for the extension shelf LED_ALM H: Turn ON
LED_RUN
Control signal for the extension shelf LED_RUN H: Turn ON
nLOS_BB
Loss of line signal
nSLFFAN_ALM
Alarm signal of the casing fan
nFAN_ALM
Fan alarm signal :It goes Low at the error of the L Power Supply’s Fan.
It goes High when the Fan is normal and Power supply M, which does not carry the FAN are used.
It goes High when the Fan is normal and Power supply M, which does not carry the FAN are used.
DC_ALM
DC alarm signal :Indicates the declined DC voltage
AC_ALM
AC alarm signal: This indicates AC voltage cutoff.
RING_SYNC
Trigger signal of Ringer signal generation timing to each internal line card.
CLK_16M
Clock 16.386MHz ASIC and CPU operation Clock.
CTSW_EN
CTSW output enable signal
SHW_CLK
Voice system clock signal from the basic shelf (8MHz)
SHW_nFH
Voice system frame signal from the basic shelf (8kHz)
nIRQ_ASIC
Interrupt signal from the ASIC
nIRQ_CCLINK
Interrupt signal from CCLINK
DATA[31:0]
CPU Data Bus
ADD[16:1]
CPU Address Bus
nCS0
Flash ROM select
nCS2
SDRAM Chip select
nCS4
SRAM Chip select
nCS5
ASIC Chip select
nCS_CCLINK
CCLINK Chip select
nCS_CTSW
CTSW Chip select
nRAS
Row Address strobe: for SDRAM
nCAS
Column address strobe: for SDRAM
RD/nWR
Read / Write Signal for SDRAM
DQM[3:0]
Data input output Mask for SDRAM
L_DATA[15:0]
Local data bus
L_ADD[16:1]
Local address bus
L_nRD
Local read signal
L_nWE0, 1
Local byte write signal
L_nWE
Local write signal
L_R/nW
Local read/write signal
nWR_CCLINK
CCLINK write signal
nDS
CCLINK data strobe signal
nRDY
CPU ready signal
ESLFID[1:0]
Extension shelf ID notification signal
BM_nRESET
Extension shelf reset signal
nDTACK
nDTACK signal from CTSW
nWAIT_NEXUS
Access wait signal from the ASIC
S_RING_SYNC
Ringer synchronous input signal from the basic shelf
S_nRESET
Reset input signal from the basic shelf
CPU_STATUS[1:0]
BUS-S status display
CLK_40M
CircLink operating clock (40.0MHz)
CCLINK_TXD
CircLink send data
Click on the first or last page to see other KX-TDA620BX (serv.man8) service manuals if exist.