Z8F042AHJ020SG Zilog, Z8F042AHJ020SG Datasheet - Page 72

• Manufacturer Part Number: Z8F042AHJ020SG
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4159; Z8F042AHJ020SG

Architecture
Operation
PS022517-0508
Master Interrupt Enable
Figure 9
The master interrupt enable bit (IRQE) in the Interrupt Control Register globally enables
and disables interrupts.
Interrupts are globally enabled by any of the following actions:
•
•
•
Interrupts are globally disabled by any of the following actions:
•
•
•
•
•
•
Internal Interrupts
Port Interrupts
Execution of an
Execution of an
Writing a 1 to the IRQE bit in the Interrupt Control Register.
Execution of a
eZ8 CPU acknowledgement of an interrupt service request from the interrupt controller.
Writing a 0 to the IRQE bit in the Interrupt Control Register.
Reset.
Execution of a Trap instruction.
Illegal Instruction trap.
displays a block diagram of the interrupt controller.
DI
Figure 9. Interrupt Controller Block Diagram
EI
IRET
(Disable Interrupt) instruction.
(Enable Interrupt) instruction.
(Return from Interrupt) instruction.
Medium
Priority
Priority
Priority
High
Low
Priority
Z8 Encore! XP
Mux
Vector
IRQ Request
Product Specification
®
Interrupt Controller
F0822 Series
59