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T81L0006B-BD Datasheet(PDF) 7 Page - Taiwan Memory Technology |
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T81L0006B-BD Datasheet(HTML) 7 Page - Taiwan Memory Technology |
7 / 21 page TE CH tm T81L0006A/B TM Technology Inc. reserves the right P. 7 Publication Date: AUG. 2005 to change products or specifications without notice. Revsion : B 10.3 Special Function Register F8H F0H B E8H E0H ACC D8H D0H PSW C8H T2CON T2MOD RCAP2L RCAP2H TL2 TH2 C0H B8H IP B0H P3 A8H IE A0H P2 98H SCON SBUF 90H P1 88H TCON TMOD TL0 TL1 TH0 TH1 80H P0* SP DPL DPH WDREL PCON *Note: P0:Internal still keeping, but for pad dominate, no external pin assignment Accumulator : ACC ACC is the Accumulator register. The mnemonics for Accumulator-Specific instructions, however, refer to the Accumulator simply as A. B Register : B The B register is used during multiply and divide operations. For other instructions it can be treated as another scratch pad register. Program Status Word : PSW The PSW register contains program status information as detailed in CY AC F0 RS1 RS0 OV -- P BIT SYMBOL FUNCTION PSW.7 CY Carry flag. PSW.6 AC Auxiliary Carry flag. (For BCD operations.) PSW.5 F0 Flag 0. (Available to the user for general purposes.) PSW.4 RS1 Register bank select control bit 1. Set/cleared by software to determine working register bank. (See Note.) PSW.3 RS0 Register bank select control bit 0. Set/cleared by software to determine working register bank. (See Note.) PSW.2 OV Overflow flag. PSW.1 — User-definable flag. PSW.0 P Parity flag. Set/cleared by hardware each instruction cycle to indicate an odd/even number of “one” bits in the Accumulator, i.e., even parity. NOTE: The contents of (RS1, RS0) enable the working register banks as follows: (0,0)— Bank 0 (00H–07H) (0,1)— Bank 1 (08H–0fH) (1,0)— Bank 2 (10H–17H) (1,1)— Bank 3 (18H–17H) |
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