Maxim DS33R11 specifications Functional Serial I/O Timing, Tx Serial Interface Functional Timing

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

12 FUNCTIONAL TIMING

12.1 Functional Serial I/O Timing

The Serial Interface provides flexible timing to interconnect with a wide variety of serial interfaces. TDEN is an input signal that can be used to enable or block the TSERO data. The “shaded bits” are not clocked by the DS33R11. The TDEN must occur one bit before the effected bit in the TSERO stream. Note that polarity of the TDEN is selectable through LI.TSLCR. In the figure below, TDEN is active low, allowing the bits to clock and inactive high, causing the next data bit not be clocked. TCLKE can be gapped as shown in the following figure. Similarly, the receiver function is governed by RCLKI, RDEN and RSERI. RSERI data will not be provided to the receiver for the bits blocked when RDEN is inactive. The RDEN polarity can be programmed by LI.RSLCR. The RDEN signal must be coincident with the RSERI bit that needs to be blocked.

Figure 12-1. Tx Serial Interface Functional Timing

TCLKE

TDEN

TCLK gappedTSERO

TCLKE Gapped

TSERO

TSER

Figure 12-2. Rx Serial Interface Functional Timing

RCLKI

RDEN

RSERI

RCLKI Gapped

RSERI

TSER

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