Z8F64210100ZDA Zilog, Z8F64210100ZDA Datasheet - Page 60
![ADAPTER ICE Z8 ENCORE 64K 44LQFP](/photos/9/2/90271/z8f64210100zda_sml.jpg)
Z8F64210100ZDA
Manufacturer Part Number
Z8F64210100ZDA
Description
ADAPTER ICE Z8 ENCORE 64K 44LQFP
Manufacturer
Zilog
Specifications of Z8F64210100ZDA
Module/board Type
*
For Use With/related Products
Z8 Encore!™
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3400
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Reset Sources
Table 9. Reset Sources and Resulting Reset Type
PS019921-0308
Operating Mode
NORMAL or HALT
modes
STOP mode
System Reset
During a system reset, the Z8 Encore! XP F64XX Series devices are held in Reset for 66
cycles of the Watchdog Timer oscillator followed by 16 cycles of the system clock. At the
beginning of Reset, all GPIO pins are configured as inputs.
During Reset, the eZ8 CPU and on-chip peripherals are idle; however, the on-chip crystal
oscillator and Watchdog Timer oscillator continue to run. The system clock begins
operating following the Watchdog Timer oscillator cycle count. The eZ8 CPU and on-chip
peripherals remain idle through the 16 cycles of the system clock.
Upon Reset, control registers within the Register File that have a defined Reset value are
loaded with their reset values. Other control registers (including the Stack Pointer,
Register Pointer, and Flags) and general-purpose RAM are undefined following Reset.
The eZ8 CPU fetches the Reset vector at Program Memory addresses
and loads that value into the Program Counter. Program execution begins at the Reset
vector address.
Table 9
vides more detailed information on the individual Reset sources. A Power-On Reset/Volt-
age Brownout event always takes priority over all other possible reset sources to ensure a
full system reset occurs.
Reset Source
Power-On Reset/Voltage
Brownout
Watchdog Timer time-out
when configured for Reset
RESET pin assertion
On-Chip Debugger initiated Reset
(OCDCTL[0] set to 1)
Power-On Reset/Voltage
Brownout
RESET pin assertion
DBG pin driven Low
lists the reset sources as a function of the operating mode. The text following pro-
system reset
system reset
system reset
Reset Type
system reset
system reset
system reset except the On-Chip Debugger is
unaffected by the reset
system reset
Z8 Encore! XP
Reset and Stop Mode Recovery
Product Specification
0002H
®
F64XX Series
and
0003H
46
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