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W79L532A25DN Datasheet(PDF) 9 Page - Winbond |
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W79L532A25DN Datasheet(HTML) 9 Page - Winbond |
9 / 77 page W79E532/W79L532 Publication Release Date: November 21, 2005 - 9 - Revision A5 Special Function Registers The W79E(L)532 uses Special Function Registers (SFRs) to control and monitor peripherals and their Modes. The SFRs reside in the register locations 80-FFh and are accessed by direct addressing only. Some of the SFRs are bit addressable. This is very useful in cases where one wishes to modify a particular bit without changing the others. The SFRs that are bit addressable are those whose addresses end in 0 or 8. The W79E(L)532 contains all the SFRs present in the standard 8052. However, some additional SFRs have been added. In some cases unused bits in the original 8052 have been given new functions. The list of SFRs is as follows. The table is condensed with eight locations per row. Empty locations indicate that there are no registers at these addresses. When a bit or register is not implemented, it will read high. Table 1. Special Function Register Location Table F8 EIP F0 B E8 EIE E0 ACC D8 WDCON PWMP PWM0 PWM1 PWMCON1 PWM2 PWM3 D0 PSW C8 T2CON T2MOD RCAP2L RCAP2H TL2 TH2 PWMCON2 PWM4 C0 PWM5 PMR STATUS TA B8 IP SADEN B0 P3 A8 IE SADDR ROMCON SFRAL SFRAH SFDFD SFRCN A0 P2 XRAMAH P4CSIN P4 98 SCON0 SBUF P42AL P42AH P43AL P43AH CHPCON 90 P1 P4CONA P4CONB P40AL P40AH P41AL P41AH 88 TCON TMOD TL0 TL1 TH0 TH1 CKCON 80 P0 SP DPL DPH PCON Note: The SFRs in the column with dark borders are bit-addressable. |
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