W79E632A Datasheet, PDF (10/79 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E632A/W79L632A
Data Pointer Low
Bit:
7
6
5
4
3
2
1
0
DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0
Mnemonic: DPL
Address: 82h
This is the low byte of the standard 8052 16-bit data pointer.
Data Pointer High
Bit:
7
DPH.7
Mnemonic: DPH
6
DPH.6
5
DPH.5
4
DPH.4
3
2
1
DPH.3 DPH.2 DPH.1
Address: 83h
0
DPH.0
This is the high byte of the standard 8052 16-bit data pointer.
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 indicates a Frame
Error and acts as the FE flag. When SMOD0 is 0, then SCON.7 acts as per the standard 8052
function.
GF1-0: These two bits are general purpose user flags.
PD: Setting this bit causes the W79E(L)632 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 W79E(L)632 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
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.
TR0: Timer 0 run control: This bit is set or cleared by software to turn timer/counter on or off.
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