WD1510

WESTERN IlIIlG§TAL c oRp o R A T/ oN WD1510-00, 01 UfO/F~FO BUFFIER REGISTER ,,514%£@*1@9*("\ £ B ! 4!Q M @&*i w"%¥ as FEATURES APPLICATIONS WORD LENGTH SELECTABLE: 128 OR 132 9 BIT WORD WIDTH o DC TO 650 KHZ (-00),1 MHz (-01) o EMPTY AND FULL FLAGS o THREE-STATE DATA LINES POINT OF SALE TERMINALS COMPUTER-TO-PERIPHERAL BUFFER o CRT BUFFER MEMORY LINE PRINTER BUFFER INTERRUPT STACK (LIFO MODE) 5-VOLT ONLY NO EXTERNAL CLOCKS REQUIRED TTL COMPATIBLE ON ALL INPUTS AND OUTPUTS o 28 PIN PLASTIC OR CERAMIC DIP MASTER RESET GENERAL DESCRIPTION The WD1510 is an MOSILSI Memory Buffer which is organized as a 9-bit by 128 or 132 word stack. The chip has 2 bidirectional data ports and may be read from or written into either port. Thus, the chip can function as a LIFO from either port or it can function as a FIFO, with data flow from either port A to port B or vice versa. The DIRECTION input pin is used to specify the data flow direction. The WD1510 is fabricated in 5-volt only N-channel technology. :.:- a«: :a:::l m wu. PIN DEFINITIONS PIN NUMBER 1 VSS NAME 2 EMPTY 3 CHIP SELECT PORT A 4 128 OR 132 5 MASTER RESET 6,8,10,12,14, 17,19,21,23 7,9,11,13,15 18,20,22,24 16 25 PORT A DATA LINES PORT B DATA LINES Vee DIRECTION 26 SYSTEM SENTINEL™ CHECKOUT 27 CHIP SELECT PORT B 28 FULL SYMBOL VSS - -EMPTY CSA 1281132 MR PAD-PAS FUNCTION Ground Indicates when there is no data in the buffer Used to select Port A for either a Read or Write operation Used t...