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W78ERD2A40FL Datasheet(PDF) 10 Page - Winbond

Part # W78ERD2A40FL
Description  8-BIT MICROCONTROLLER
Download  76 Pages
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W78ERD2A40FL Datasheet(HTML) 10 Page - Winbond

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W78ERD2/W78ERD2A
- 10 -
Port Option Register
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
P0UP
Mnemonic: POPT
Address: 86h
BIT
NAME
FUNCTION
1 – 7
-
Reserve
0
P0UP
0: Port 0 pins are open-drain.
1: Port 0 pins are internally pulled-up. Port 0 is structurally the same as Port 2.
Power Control
Bit:
7
6
5
4
3
2
1
0
SMOD SMOD0
-
POR
GF1
GF0
PD
IDL
Mnemonic: PCON
Address: 87h
BIT
NAME
FUNCTION
7
SMOD
1: Double the serial-port baud rate in serial port modes 1, 2, and 3.
6
SMOD0
0: Framing Error Detection Disable. SCON.7 acts as per the standard 8052
function.
1: Framing Error Detection Enable. SCON.7 indicates a Frame Error and acts as
the FE (FE_1) flag.
5
-
Reserved
4
POF
This bit is set to 1 when a power-on reset has occurred. It can be cleared by
software.
3
GF1
General-purpose flag.
2
GF0
General-purpose flag.
1
PD
Set this bit to 1 to go into POWER DOWN mode.
0
IDL
Set this bit to 1 to go into IDLE mode.
Timer Control
Bit:
7
6
5
4
3
2
1
0
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
Mnemonic: TCON
Address: 88h


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