Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 73

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• 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: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

Table 35. Interrupt Request 2 Register (IRQ2)
BITS
FIELD
RESET
R/W
ADDR
PS022825-0908
Interrupt Request 2 Register
IRQ0 Enable High and Low Bit Registers
R/W
7
0
The Interrupt Request 2 (IRQ2) register
tored and polled interrupts. When a request is presented to the interrupt controller, the cor-
responding bit in the IRQ2 register becomes 1. If interrupts are globally enabled (vectored
interrupts), the interrupt controller passes an interrupt request to the eZ8 CPU. If interrupts
are globally disabled (polled interrupts), the eZ8 CPU can read the Interrupt Request 2
register to determine if any interrupt requests are pending.
Reserved—Must be 0.
PCxI—Port C Pin x Interrupt Request
0 = No interrupt request is pending for GPIO Port C pin x.
1 = An interrupt request from GPIO Port C pin x is awaiting service.
where x indicates the specific GPIO Port C pin number (0–3).
Table 36
registers
Interrupt Request 0 register.
Table 36. IRQ0 Enable and Priority Encoding
IRQ0ENH[x] IRQ0ENL[x] Priority
where x indicates the register bits from 0–7.
0
0
1
1
(Table 37
describes the priority control for IRQ0. The IRQ0 Enable High and Low Bit
R/W
6
0
Reserved
and
0
1
0
1
R/W
Table
5
0
38) form a priority encoded enabling for interrupts in the
Disabled
Level 1
Level 2
Level 3
R/W
4
0
FC6H
(Table
PC3I
R/W
Description
Disabled
Low
Medium
High
35) stores interrupt requests for both vec-
3
0
Z8 Encore! XP
PC2I
R/W
2
0
Product Specification
PC1I
R/W
1
0
®
Interrupt Controller
F082A Series
PC0I
R/W
0
0
62