Z8F042AHH020EC Zilog, Z8F042AHH020EC Datasheet - Page 66

• Manufacturer Part Number: Z8F042AHH020EC
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EC

• 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: 17
• 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 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3368

Interrupt Controller
Interrupt Vector Listing
PS022825-0908
Note:
The interrupt controller on the Z8 Encore! XP F082A Series products prioritizes the inter-
rupt requests from the on-chip peripherals and the GPIO port pins. The features of inter-
rupt controller include:
Interrupt requests (IRQs) allow peripheral devices to suspend CPU operation in an orderly
manner and force the CPU to start an interrupt service routine (ISR). Usually this interrupt
service routine is involved with the exchange of data, status information, or control infor-
mation between the CPU and the interrupting peripheral. When the service routine is
completed, the CPU returns to the operation from which it was interrupted.
The eZ8 CPU supports both vectored and polled interrupt handling. For polled interrupts,
the interrupt controller has no effect on operation. For more information on interrupt ser-
vicing by the eZ8 CPU, refer to eZ8 CPU Core User Manual (UM0128) available for
download at www.zilog.com.
Table 32
vector is stored with the most-significant byte (MSB) at the even Program Memory
address and the least-significant byte (LSB) at the following odd Program Memory
address.
Some port interrupts are not available on the 8- and 20-pin packages. The ADC interrupt
is unavailable on devices not containing an ADC.
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20 possible interrupt sources with 18 unique interrupt vectors:
–
–
Flexible GPIO interrupts:
–
–
Three levels of individually programmable interrupt priority.
Watchdog Timer and LVD can be configured to generate an interrupt.
Supports vectored as well as polled interrupts
on page 56 lists all of the interrupts available in order of priority. The interrupt
Twelve GPIO port pin interrupt sources (two interrupt vectors are shared).
Eight on-chip peripheral interrupt sources (two interrupt vectors are shared).
Eight selectable rising and falling edge GPIO interrupts.
Four dual-edge interrupts.
Z8 Encore! XP
Product Specification
®
Interrupt Controller
F082A Series
55