CHAPTER 4 INTERFACES
PRELIMINARY
NEC confidential and Proprietary
144
4.4.3 Transmit Section and Line DCC Insert Interface
TSDCLK is a 216kHz. TLDCLK is a 648kHz. TSD is sampled on the rising edge of TSDCLK. TLD is sampled
on the rising edge of TLDCLK. The D1-D3, and D4-D12 bytes shifted in to the
µ
PD98413 in the frame shown are
inserted in the corresponding transport overhead channels in the next frame.
Figure 4-23. DCC Insert timing
b
TSDCLK
(
O
)
(
216KHz
)
TSD
(
I
)
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b
b b b b b b b b b b b b b b b b b b b b b b b
TLDCLK
(
O
)
(
648KHz
)
TLD
(
I
)
3
×
TSDCLK
9
×
TLDCLK
4.4.4 Receive Section and Line DCC Extract Interface
RSDCLK is a 216kHz. RLDCLK is a 648kHz. RSD is updated on the falling edge of RSDCLK. RLD is updated
on the falling edge of RLDCLK. The D1-D3, and D4-D12 bytes shifted out of the
µ
PD98413 in the frame shown
are extracted in the corresponding transport overhead channels in the previous frame.
Figure 4-24. DCC Extract timing
b
RSDCLK
(
O
)
(
216KHz
)
RSD
(
O
)
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b
b b b b b b b b b b b b b b b b b b b b b b b
RLDCLK
(
O
)
(
648KHz
)
RLD
(
O
)
3
×
RSDCLK
9
×
RLDCLK
Summary of Contents for NEASCOT-P65
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