W78E052DDG Nuvoton Technology Corporation of America, W78E052DDG Datasheet - Page 26

• Manufacturer Part Number: W78E052DDG
• Description: IC MCU 8-BIT 8K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E052DDG

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Port 2
Mnemonic: P2
Interrupt Enable
Mnemonic: IE
Port 3
Mnemonic: P3
BIT
7~0
Bit:
BIT
7-0
Bit:
BIT
7
6
5
4
3
2
1
0
Bit:
BIT
7
P3.7-0: General purpose Input/Output port. Most instructions will read the port pins in case of a port
read access, however in case of read-modify-write instructions, the port latch is read. These alter-
nate functions are described below:
NAME
P2.[7:0]
7
P2.7
NAME
EA
-
ET2
ES
ET1
EX1
ET0
EX0
7
P3.7
NAME
P3.7
NAME
SBUF
7
EA
FUNCTION
Port 2 is a bi-directional I/O port with internal pull-ups. This port also provides the
upper address bits for accesses to external memory.
6
6
P2.6
P3.6
6
-
FUNCTION
Serial data on the serial port is read from or written to this location. It actually
consists of two separate internal 8-bit registers. One is the receive resister, and
the other is the transmit buffer. Any read access gets data from the receive data
buffer, while write access is to the transmit data buffer.
FUNCTION
Global enable. Enable/Disable all interrupts.
Reserved
Enable Timer 2 interrupt.
Enable Serial Port 0 interrupt.
Enable Timer 1 interrupt.
Enable external interrupt 1.
Enable Timer 0 interrupt.
Enable external interrupt 0.
FUNCTION
RD
5
P2.5
5
P3.5
5
ET2
W78E054D/W78E052D/W78E051D Data Sheet
4
4
P2.4
P3.4
4
ES
- 26 -
3
P2.3
3
P3.3
3
ET1
2
P3.2
2
P2.2
2
EX1
1
P2.1
1
ET0
1
P3.1
Address: A0h
Address: B0h
Address: A8h
0
0
P2.0
0
EX0
P3.0