W78E052DDG Nuvoton Technology Corporation of America, W78E052DDG Datasheet - Page 10

• 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: -

Pin Description, continued
* Note: TYPE I: input, O: output, I/O: bi-directional, H: pull-high, L: pull-low, D: open drain.
In application if MCU pins need external pull-up, it is recommended to add a pull-up resistor
(10K
SYMBOL
P3.0−P3.7
P4.0−P4.3
Ω)
between pin and power (V
TYPE DESCRIPTIONS
I/O H
I/O H
PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have al-
ternate functions, which are described below:
RXD (P3.0): Serial Port 0 input
TXD (P3.1): Serial Port 0 output
T0 (P3.4) : Timer 0 External Input
T1 (P3.5) : Timer 1 External Input
PORT 4: Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are
alternative function pins. It can be used as general I/O port or external interrupt
input sources ( INT2 / INT3 ).
INT0 (P3.2) : External Interrupt 0
INT1 (P3.3) : External Interrupt 1
RD (P3.7) : External Data Memory Read Strobe
WR (P3.6) : External Data Memory Write Strobe
DD
) instead of directly wiring pin to V
W78E054D/W78E052D/W78E051D Data Sheet
- 10 -
DD
for enhancing EMC.