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W49V002FAP Datasheet(PDF) 5 Page - Winbond |
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W49V002FAP Datasheet(HTML) 5 Page - Winbond |
5 / 32 page W49V002FA Publication Release Date: February 19, 2002 - 5 - Revision A2 Toggle Bit (DQ6)- Write Status Detection In addition to data polling, the W49V002FA provides another method for determining the end of a program cycle. During the internal program or erase cycle, any consecutive attempts to read DQ6 will produce alternating 0's and 1's. When the program or erase cycle is completed, this toggling between 0's and 1's will stop. The device is then ready for the next operation. General Purpose Inputs Register This register reads the FGPI[4:0] pins on the W49V002FA.This is a pass-through register which can read via memory address FFBC0100(hex). Since it is pass-through register, there is no default value. BIT FUNCTION 7 − 5 Reserved 4 Read FGPI4 pin status 3 Read FGPI3 pin status 2 Read FGPI2 pin status 1 Read FGPI1 pin status 0 Read FGPI0 pin status Product Identification The product ID operation outputs the manufacturer code and device code. Programming equipment automatically matches the device with its proper erase and programming algorithms. The manufacturer and device codes can be accessed by software operation. In the software access mode, a six-byte (or JEDEC 3-byte) command sequence can be used to access the product ID for programmer interface mode. A read from address 0000(hex) outputs the manufacturer code, DA(hex). A read from address 0001(hex) outputs the device code, 32(hex).” The product ID operation can be terminated by a three-byte command sequence or an alternate one-byte command sequence (see Command Definition table). As for FWH interface mode, a read from FFBC, 0000(hex) can output the manufacturer code, DA(hex). A read from FFBC, 0001(hex) can output the device code 32(hex). TABLE OF OPERATING MODES Operating Mode Selection - Programmer Mode (VHH = 12V ± 5%) MODE PINS #OE #WE #RESET ADDRESS DQ. Read VIL VIH VIH AIN Dout Write VIH VIL VIH AIN Din Standby X X VIL X High Z Write Inhibit VIL X VIH X High Z/DOUT X VIH VIH X High Z/DOUT Output Disable VIH X VIH X High Z |
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