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IDT82V2081 Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT82V2081 Datasheet(HTML) 11 Page - Integrated Device Technology |
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11 / 68 page  11 INDUSTRIAL TEMPERATURE RANGES SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT INT RXTXM0 O I 20 INT: Interrupt Request In software control mode, this pin outputs the general interrupt request for all interrupt sources. These interrupt sources can be masked individually via registers (INTM0, 14H) and (INTM1, 15H). The interrupt status is reported via the registers (INTS0, 19H) and (INTS1, 1AH). Output characteristics of this pin can be defined to be push-pull (active high or active low) or open-drain (active low) by setting INT_PIN[1:0] (GCF, 02H). RXTXM0 See RXTXM1 above. SCLK ALE AS LP1 I 25 SCLK: Shift Clock In serial microcontroller interface mode, this signal is the shift clock for the serial interface. Configuration data on SDI pin is sam- pled on the rising edge of SCLK. Configuration and status data on SDO pin is clocked out of the device on the falling edge of SCLK if SCLKE pin is high, or on the rising edge of SCLK if SCLKE pin is low. ALE: Address Latch Enable In parallel microcontroller interface mode with multiplexed Intel interface, the address on AD[7:0] is sampled into the device on the falling edge of ALE. AS: Address Strobe In parallel microcontroller interface mode with multiplexed Motorola interface, the address on AD[7:0] is latched into the device on the falling edge of AS. LP[1:0]: Loopback mode select When the chip is configured by hardware, this pin is used to select loopback operation modes (Inband Loopback is not provided in hardware control mode) • 00= no loopback • 01= analog loopback • 10= digital loopback • 11= remote loopback SDI WR R/W LP0 I 24 SDI: Serial Data Input In serial microcontroller interface mode, this signal is the input data to the serial interface. Configuration data at SDI pin is sam- pled by the device on the rising edge of SCLK. WR: Write Strobe In Intel parallel multiplexed interface mode, this pin is asserted low by the microcontroller to initiate a write cycle. The data on AD[7:0] is sampled into the device in a write operation. R/W: Read/Write Select In Motorola parallel multiplexed interface mode, this pin is low for write operation and high for read operation. LP0 See LP1 above. Table-1 Pin Description (Continued) Name Type Pin No. Description |
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