W78L801A24LL Nuvoton Technology Corporation of America, W78L801A24LL Datasheet - Page 8

• Manufacturer Part Number: W78L801A24LL
• Description: IC MCU 8-BIT 4K ROM 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78L801A24LL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: EBI/EMI
• Peripherals: LED, WDT
• Number Of I /o: 36
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: Mask ROM
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

is set to 1. i.e. User’s applications should elude the ALE pulses before software configure it with I/O
port P4.5.
6.1
The W78L801 has twelve interrupt sources: INT0 and INT1 ; Timer 0,1; INT2 to INT9. Each interrupt
vectors to a specific location in program memory for its interrupt service routine. Each of these
sources can be individually enabled or disabled by setting or clearing the corresponding bit in Special
Function Register IE0 and IE1. The individual interrupt priority level depends on the Interrupt Priority
Register IP0 and IP1. Additional external interrupts INT2 to INT9 are level sensitive and may be used
to awake the device from power down mode. The Port 1 interrupts can be initialized to either active
HIGH or LOW via setting the Interrupt Polarity Register IX. The IRQ register contains the flags of Port
1 interrupts. Each flag in IRQ register will be set when an interrupt request is recognized but must be
cleared by software . Note that the interrupt flags have to be cleared before the interrupt service
routine is completed, or else another interrupt will be generated.
Interrupt Enable Register 0
Interrupt Enable Register 1
EA : Global enable. Enable/disable all interrupts.
ET1: Enable Timer 1 interrupt
EX1: Enable external interrupt 1
ET0: Enable Timer 0 interrupt
EX0: Enable external interrupt 0
EX9: Enable external interrupt 9
EX8: Enable external interrupt 8
EX7: Enable external interrupt 7
EX6: Enable external interrupt 6
EX5: Enable external interrupt 5
EX4: Enable external interrupt 4
EX3: Enable external interrupt 3
EX2: Enable external interrupt 2
Interrupt System
Bit:
Bit:
Bit:
Mnemonic: P4
EX9
Mnemonic: IE
Mnemonic: IE1
EA
7
7
7
-
P4.6
EX8
6
6
6
-
P4.5
EX7
- 8 -
5
5
5
-
EX6
Address: A8H
Address: E8H
4
4
4
-
-
Address: D8H
P4.3
ET1
EX5
3
3
3
P4.2
EX1
EX4
2
2
2
P4.1
EX3
ET0
W78L801
1
1
1
P4.0
EX0
EX2
0
0
0