XRT83SL216

PRELIMINARY

xr

16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

REV. P1.0.3

26

4.0 SERIAL MICROPROCESSOR INTERFACE BLOCK

The serial microprocessor uses a standard 3-pin serial port with CS, SCLK, and SDI for programming the LIU.

Optional pins such as SDO, INT, and RESET allow the ability to read back contents of the registers, monitor

the LIU via an interrupt pin, and reset the LIU to its default configuration by pulling reset "Low" for more than

10

µS. A simplified block diagram of the Serial Microprocessor is shown in Figure 20.

Serial

Microprocssor

Interface

CS

SCLK

SDI

INT

SDO

RESET