Z8F6423FT00ZEM Zilog, Z8F6423FT00ZEM Datasheet - Page 61
Z8F6423FT00ZEM
Manufacturer Part Number
Z8F6423FT00ZEM
Description
KIT ICE Z8 ENCORE 64K 80QFP
Manufacturer
Zilog
Series
Z8 Encore!®r
Type
In-Circuit Emulator Systemr
Specifications of Z8F6423FT00ZEM
Contents
Emulator Board, Cables, Software and Documentation
For Use With/related Products
Z8 Encore! 80-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3397
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PS019921-0308
Internal RESET
WDT Clock
Not to Scale
VCC = 0.0 V
Oscillator
Primary
signal
Power-On Reset
Voltage Brownout Reset
V
V
POR
VBO
Each device in the Z8 Encore! XP F64XX Series contains an internal Power-On Reset cir-
cuit. The POR circuit monitors the supply voltage and holds the device in the Reset state
until the supply voltage reaches a safe operating level. After the supply voltage exceeds
the POR voltage threshold (V
the Watchdog Timer oscillator. After the POR counter times out, the XTAL Counter is
enabled to count a total of 16 system clock pulses. The devices are held in the Reset state
until both the POR Counter and XTAL counter have timed out. After the Z8 Encore! XP
F64XX Series devices exit the Power-On Reset state, the eZ8 CPU fetches the Reset vec-
tor. Following Power-On Reset, the POR status bit in the Watchdog Timer Control
(WDTCTL) register is set to 1.
Figure 7
Electrical Characteristics
The devices in the Z8 Encore! XP F64XX Series provide low Voltage Brownout
protection. The VBO circuit senses when the supply voltage drops to an unsafe level
displays Power-On Reset operation. For the POR threshold voltage (V
Oscillator
Start-up
Figure 7. Power-On Reset Operation
on page 211.
counter delay
POR
POR
), the POR Counter is enabled and counts 66 cycles of
counter delay
XTAL
Z8 Encore! XP
Reset and Stop Mode Recovery
Product Specification
Execution
Program
®
F64XX Series
VCC = 3.3 V
POR
), see
47
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