L64777 LSI Logic Corporation, L64777 Datasheet - Page 85

• Manufacturer Part Number: L64777
• Description: DVB Qam Modulator
• Manufacturer: LSI Logic Corporation

5.4 Test Signals
FSTARTOUT Frame Start Output
SYNCOK
FTMODE[2:0] Functional Test Bus
IDDTN[3]
NT_OUT[4]
SCAN_ENABLE[5]
TNn[11]
TRSTn[10]
TMS[9]
TDO[8]
Test Signals
FSTARTOUT is asserted during the first symbol in every
sync frame. The width of FSTARTOUT reflects the
number of bytes that the gap parameter inserts. A
one-cycle width indicates no inserted gaps; a width of 17
means 16 inserted bytes as an Reed-Solomon gap.
FSTARTOUT is applied only in sync word detection
mode. If FSTARTIN pulses force synchronization,
FSTARTOUT is constantly LOW.
SYNC Detection/Phase Monitoring
In internal sync mode, this pin indicates undisturbed
synchronization status when HIGH. This signal is
asserted when the number of track steps required for
synchronization is fulfilled. If FSTARTIN pulses force
synchronization, SYNCOK is constantly LOW.
These must be tied to 0.
IDD Test Mode
IDDTN is a production test pin.
Nand Tree Output
NT_OUT is a production test pin.
Scan Enable
This pin enables scan chain shift.
Test Output Enable
TNn switches all 3-state buffers to high-impedance mode
for testing.
Test Reset
Reset for the JTAG unit.
Test Mode Select
TMS selects the JTAG unit test mode.
Test Data Output
TDO is the JTAG unit data output.
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
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