W77E516 查看數據表（PDF） - Winbond

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W77E516

8-BIT MICROCONTROLLER

Winbond 

Preliminary W77E516

Data Pointer High1

Bit:

7

6

5

4

3

2

1

0

DPH1.7 DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0

Mnemonic: DPH1

Address: 85h

This is the high byte of the new additional 16-bit data pointer that has been added to the W77E516.

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

activeData 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

SM0D SMOD0

-

4

3

2

1

0

-

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 W77E516 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 W77E516 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

IT1

IE0

IT0

Mnemonic: TCON

Address: 88h

- 13 -

Publication Release Date: August 16, 2002

Revision A1

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