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71M6534 Datasheet(PDF) 23 Page - Maxim Integrated Products |
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71M6534 Datasheet(HTML) 23 Page - Maxim Integrated Products |
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23 / 132 page  FDS_6533_6534_004 71M6533/G/H and 71M6534/H Data Sheet Rev 2 23 Name Address (Hex) Reset value (Hex) Description Page IEN0 0xA8 0x00 Interrupt Enable Register 0 31 IP0 0xA9 0x00 Interrupt Priority Register 0 34 S0RELL 0xAA 0xD9 Serial Port 0, Reload Register, low byte 26 P3 0xB0 0xFF Port 3 24 IEN1 0xB8 0x00 Interrupt Enable Register 1 31 IP1 0xB9 0x00 Interrupt Priority Register 1 34 S0RELH 0xBA 0x03 Serial Port 0, Reload Register, high byte 26 S1RELH 0xBB 0x03 Serial Port 1, Reload Register, high byte 26 PDATA 0xBF 0x00 High address byte for MOVX@Ri - also called USR2 20 IRCON 0xC0 0x00 Interrupt Request Control Register 32 T2CON 0xC8 0x00 Polarity for INT2 and INT3 32 PSW 0xD0 0x00 Program Status Word 23 WDCON 0xD8 0x00 Baud Rate Control Register (only WDCON[7] bit used) 26 A 0xE0 0x00 Accumulator 23 B 0xF0 0x00 B Register 23 Accumulator (ACC, A, SFR 0xE0): ACC is the accumulator register. Most instructions use the accumulator to hold the operand. The mnemonics for accumulator-specific instructions refer to accumulator as A, not ACC. B Register (SFR 0xF0): The B register is used during multiply and divide instructions. It can also be used as a scratch-pad register to hold temporary data. Program Status Word (PSW, SFR 0xD0)): This register contains various flags and control bits for the selection of the register banks (see Table 11). Table 11: PSW Bit Functions (SFR 0xD0) PSW Bit Symbol Function 7 CV Carry flag. 6 AC Auxiliary Carry flag for BCD operations. 5 F0 General purpose Flag 0 available for user. F0 is not to be confused with the F0 flag in the CESTATUS register. 4 RS1 Register bank select control bits. The contents of RS1 and RS0 select the working register bank: RS1/RS0 Bank selected Location 00 Bank 0 0x00 – 0x07 01 Bank 1 0x08 – 0x0F 10 Bank 2 0x10 – 0x17 11 Bank 3 0x18 – 0x1F 3 RS0 2 OV Overflow flag. 1 – User defined flag. 0 P Parity flag, affected by hardware to indicate odd or even number of one bits in the Accumulator, i.e. even parity. |
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