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UPD17015GS Datasheet(PDF) 110 Page - NEC |
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UPD17015GS Datasheet(HTML) 110 Page - NEC |
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110 / 120 page  110 µPD17015 17. RESERVED SYMBOLS 17.1 SYSTEM REGISTER (SYSREG) Symbol Attribute Value Read/write Description DBF3 MEM 0.0CH R/W DBF bits 15 to 12 DBF2 MEM 0.0DH R/W DBF bits 11 to 8 DBF1 MEM 0.0EH R/W DBF bits 7 to 4 DBF0 MEM 0.0FH R/W DBF bits 3 to 0 Symbol Attribute Value Read/write Description AR3 MEM 0.74H R/W Bits 15 to 12 of the address register AR2 MEM 0.75H R/W Bits 11 to 8 of the address register AR1 MEM 0.76H R/W Bits 7 to 4 of the address register AR0 MEM 0.77H R/W Bits 3 to 0 of the address register WR MEM 0.78H R/W Window register BANK MEM 0.79H R/W Bank register IXH MEM 0.7AH R/W Index register high (Fixed to 0.) MPH MEM 0.7AH R/W Memory pointer high MPE FLG 0.7AH.3 R/W Memory pointer enable flag IXM MEM 0.7BH R/W Index register middle MPL MEM 0.7BH R/W Memory pointer low IXL MEM 0.7CH R/W Index register low RPH MEM 0.7DH R/W General register pointer high RPL MEM 0.7EH R/W General register pointer low (Only low-order one bit is valid.) PSW MEM 0.7FH R/W Program status word BCD FLG 0.7EH.0 R/W BCD flag CMP FLG 0.7FH.3 R/W Compare flag CY FLG 0.7FH.2 R/W Carry flag Z FLG 0.7FH.1 R/W Zero flag IXE FLG 0.7FH.0 R/W Index enable flag (Fixed to 0.) 17.2 DATA BUFFER (DBF) |
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