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XRT83VSH316 Datasheet(PDF) 6 Page - Exar Corporation |
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XRT83VSH316 Datasheet(HTML) 6 Page - Exar Corporation |
6 / 97 page XRT83VSH316 3 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT REV. 1.0.0 1.0 PIN DESCRIPTIONS MICROPROCESSOR NAME PIN TYPE DESCRIPTION CS A19 I Chip Select Input Active low signal. This signal enables the microprocessor interface by pulling chip select "Low". The microprocessor interface is disabled when the chip select signal returns "High". This pin is used for both the Parallel or the Serial Interface modes. NOTE: Internally pulled "High" with a 50k Ω resistor. ALE_TS D15 I Address Latch Enable Input (Transfer Start) See the Microprocessor section of this datasheet for a description. NOTE: Internally pulled "Low" with a 50k Ω resistor. WR_R/W E15 I Write Strobe Input (Read/Write) See the Microprocessor section of this datasheet for a description. NOTE: Internally pulled "Low" with a 50k Ω resistor. RD_WE C18 I Read Strobe Input (Write Enable) See the Microprocessor section of this datasheet for a description. NOTE: Internally pulled "Low" with a 50k Ω resistor. RDY_TA R5 O Ready Output (Transfer Acknowledge) See the Microprocessor section of this datasheet for a description. INT B19 O Interrupt Output Active low signal. This signal is asserted "Low" when a change in alarm status occurs. Once the status registers have been read, the interrupt pin will return "High". GIE (Global Interrupt Enable) must be set "High" in the appropriate global register to enable interrupt generation. NOTE: This pin is an open-drain output that requires an external 10K Ω pull-up resistor. PCLK U6 I Micro Processor Clock Input In a synchronous microprocessor interface, PCLK is used as the internal timing reference for programming the LIU. NOTE: Internally pulled "Low" with a 50k Ω resistor. ADDR9 ADDR8 ADDR7 ADDR6 ADDR5 ADDR4 ADDR3 ADDR2 ADDR1 ADDR0 E17 D17 Y18 W18 W17 V17 V16 U16 U15 T15 I Address Bus Input ADDR[9:0] are a direct address bus for permitting access to the internal regis- ters. NOTE: Internally pulled "Low" with a 50k Ω resistor. |
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