Z8F64220100ZDA Zilog, Z8F64220100ZDA Datasheet - Page 205
Manufacturer Part Number
ADAPTER ICE Z8 ENCORE 64K 64LQFP
Specifications of Z8F64220100ZDA
For Use With/related Products
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Option Bit Address Space
Option Bit Configuration By Reset
Option Bits allow user configuration of certain aspects of the Z8 Encore! XP
Series operation. The feature configuration data is stored in the Flash Memory and read
during Reset. The features available for control via the Option Bits are:
Each time the Option Bits are programmed or erased, the device must be Reset for the
change to take place. 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 F64XX Series. Option Bit control is established
before the device exits Reset and the eZ8 CPU begins code execution. The Option Config-
uration registers are not part of the Register File and are not accessible for read or write
The first two bytes of Flash Memory at addresses
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 the user code in Flash
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.
is reserved for future use and must remain unprogrammed.
on page 193) are reserved for the user Option Bits. The byte at Flash
configures user options. The byte at Flash Memory address
Z8 Encore! XP
on page 192) and