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W77IC32P-25 Datasheet(PDF) 10 Page - Winbond |
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W77IC32P-25 Datasheet(HTML) 10 Page - Winbond |
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10 / 70 page  Preliminary W77IC32 - 10 - Mnemonic: DPH1 Address: 85h This is the high byte of the new additional 16-bit data pointer that has been added to the W77IC32. The user can switch between DPL, DPH and DPL1, DPH1 simply by setting register DPS = 1. The instructions that use DPTR will now access DPL1 and DPH1 in place of DPL and DPH. If they are not required they can be used as conventional register locations by the user. Data Pointer Select Bit: 7 6 5 4 3 2 1 0 - - - - - - - DPS.0 Mnemonic: DPS Address: 86h DPS.0: This bit is used to select either the DPL,DPH pair or the DPL1,DPH1 pair as the active Data Pointer. When set to 1, DPL1,DPH1 will be selected, otherwise DPL,DPH will be selected. DPS.1-7:These bits are reserved, but will read 0. Power Control Bit: 7 6 5 4 3 2 1 0 SM0D SMOD0 - - GF1 GF0 PD IDL Mnemonic: PCON Address: 87h SMOD : This bit doubles the serial port baud rate in mode 1, 2, and 3 when set to 1. SMOD0: Framing Error Detection Enable: When SMOD0 is set to 1, then SCON.7(SCON1.7) indicates a Frame Error and acts as the FE(FE_1) flag. When SMOD0 is 0, then SCON.7(SCON1.7) acts as per the standard 8052 function. GF1-0: These two bits are general purpose user flags. PD: Setting this bit causes the W77IC32 to go into the POWER DOWN mode. In this mode all the clocks are stopped and program execution is frozen. IDL: Setting this bit causes the W77IC32 to go into the IDLE mode. In this mode the clocks to the CPU are stopped, so program execution is frozen. But the clock to the serial, timer and interrupt blocks is not stopped, and these blocks continue operating. Timer Control Bit: 7 6 5 4 3 2 1 0 TF1 TR1 TF0 TR0 IE1 IT IE0 IT Mnemonic: TCON Address: 88h TF1: Timer 1 overflow flag: This bit is set when Timer 1 overflows. It is cleared automatically when the program does a timer 1 interrupt service routine. Software can also set or clear this bit. TR1: Timer 1 run control: This bit is set or cleared by software to turn timer/counter on or off. TF0: Timer 0 overflow flag: This bit is set when Timer 0 overflows. It is cleared automatically when the program does a timer 0 interrupt service routine. Software can also set or clear this bit. |
Similar Part No. - W77IC32P-25 |
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Similar Description - W77IC32P-25 |
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