CHAPTER 4 INTERFACES
PRELIMINARY
NEC confidential and Proprietary
145
4.5 Frame Pulse input pins
The
µ
PD98413 has a frame pulse input pin (TFPI). TFPI is used to align the SONET/SDH transport frame
generated by the
µ
PD98413 device to a system reference. When detected the frame pulse input from external
peripheral devices, the
µ
PD98413 starts transmit frame after fixed delay. Therefore, please avoid the usage every
frame input. TFPI is sampled on the own rising edge. TFPI must be tied low if not use this pin. TFPI is enabled by
the setting of the TFPE bit of the MDPT register.
Содержание NEASCOT-P65
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