Z8F042AHH020EG Zilog, Z8F042AHH020EG Datasheet - Page 176

• Manufacturer Part Number: Z8F042AHH020EG
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EG

• 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: Lead free / RoHS Compliant
• Other names: 269-4156; Z8F042AHH020EG

Option Bits
Operation
Option Bit Address Space
PS022517-0508
Option Bit Configuration By Reset
Option Bits allow user configuration of certain aspects of Z8 Encore! XP
operation. The feature configuration data is stored in Flash Memory and read during
Reset. Features available for control through the Option Bits are:
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During any reset operation (System Reset, Reset, or Stop Mode Recovery), the Option
Bits are automatically read from the Flash Memory and written to Option Configuration
registers. The Option Configuration registers control operation of the devices within the
Z8 Encore! XP F0822 Series. Option Bit control is established before the device exits
Reset and the eZ8 CPU begins code execution. The Option Configuration registers are not
part of the Register File and are not accessible for read or write access. Each time the
Option Bits are programmed or erased, the device must be Reset for the change to take
place (Flash version
The first two bytes of Flash Memory at addresses
0001H
byte at Program Memory address
ory address
Watchdog Timer time-out response selection–interrupt or Reset.
Watchdog Timer enabled at Reset.
The ability to prevent unwanted read access to user code in Flash Memory.
The ability to prevent accidental programming and erasure of all or a portion of the
user code in Flash Memory.
Voltage Brownout configuration-always enabled or disabled during STOP mode to
reduce STOP mode power consumption.
Oscillator mode selection-for high, medium, and low power crystal oscillators, or
external RC oscillator.
(Table 90
0001H
on page 165) are reserved for the user programmable Option Bits. The
is reserved for future use and must be left in its unprogrammed state.
only).
0000H
configures user options. The byte at Flash Mem-
0000H
Z8 Encore! XP
(Table 89
Product Specification
on page 164) and
®
®
F0822 Series
F0822 Series
Option Bits
163