Z8F64220100ZDA Zilog, Z8F64220100ZDA Datasheet - Page 205

• Manufacturer Part Number: Z8F64220100ZDA
• Description: ADAPTER ICE Z8 ENCORE 64K 64LQFP
• Manufacturer: Zilog

Specifications of Z8F64220100ZDA

• Module/board Type: *
• For Use With/related Products: Z8 Encore!™
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3403

Option Bits
Operation
Option Bit Address Space
PS019921-0308
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
access.
The first two bytes of Flash Memory at addresses
0001H
Memory address
0001H
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
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.
(see
is reserved for future use and must remain unprogrammed.
Table 99
0000H
on page 193) are reserved for the user Option Bits. The byte at Flash
configures user options. The byte at Flash Memory address
0000H
Z8 Encore! XP
(see
Table 98
Product Specification
on page 192) and
®
F64XX Series
®
F64XX
Option Bits
191