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XRT83VSH314IB Datasheet(PDF) 8 Page - Exar Corporation |
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XRT83VSH314IB Datasheet(HTML) 8 Page - Exar Corporation |
8 / 80 page XRT83VSH314 5 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT REV. 1.0.1 ADDR10 ADDR9 ADDR8 ADDR7 ADDR6 ADDR5 ADDR4 ADDR3 ADDR2 ADDR1 ADDR0 A23 E20 C22 Y18 AA19 AB20 AC21 AB21 AA20 Y19 AC22 I Address Bus Input ADDR[10:8] is used as a chip select decoder. The LIU has 5 chip select output pins for enabling up to 5 additional devices for accessing internal registers. The LIU has the option to select itself (master device), up to 5 additional devices, or all 6 devices simultaneously by setting the ADDR[10:8] pins speci- fied below. ADDR[7:0] is a direct address bus for permitting access to the internal registers. ADDR[10:8] 000 = Master Device 001 = Chip Select Output 1 (Pin B21) 010 = Chip Select Output 2 (Pin D19) 011 = Chip Select Output 3 (Pin C20) 100 = Chip Select Output 4 (Pin A21) 101 = Chip Select Output 5 (Pin B20) 110 = Reserved 111 = All Chip Selects Active Including the Master Device NOTE: Internally pulled "Low" with a 50k Ω resistor. DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0 AA4 AB3 AC3 AA5 Y6 AB4 AC4 AB5 I/O Bi-directional Data Bus DATA[7:0] is a bi-directional data bus used for read and write operations. NOTE: Internally pulled "Low" with a 50k Ω resistor. µPTS2 µPTS1 µPTS0 AC23 AB22 AA21 I Microprocessor Type Select Input µPTS[2:0] are used to select the microprocessor type interface. 000 = Intel 68HC11, 8051, 80C188 (Asynchronous) 001 = Motorola 68K (Asynchronous) 111 = Motorola MPC8260, MPC860 Power PC (Synchronous) NOTE: Internally pulled "Low" with a 50k Ω resistor. Reset B22 I Hardware Reset Input Active low signal. When this pin is pulled "Low" for more than 10µS, the inter- nal registers are set to their default state. See the register description for the default values. NOTE: Internally pulled "High" with a 50K Ω resistor. CS5 CS4 CS3 CS2 CS1 B20 A21 C20 D19 B21 O Chip Select Output The XRT83VSH314 can be used to provide the necessary chip selects for up to 5 additional devices by using the 3 MSBs ADDR[10:8] from the 11-Bit address bus. The LIU allows up to 84-channel applications with only using one chip select. See the ADDR[10:0] definition in the pin description. MICROPROCESSOR NAME PIN TYPE DESCRIPTION |
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