Z8 Encore! XP® 4K Series
Product Specification
219
On-Chip Peripheral AC and DC Electrical Characteristics
Table 134. Power-On Reset and Voltage Brown-Out Electrical Characteristics and Timing
TA = -40°C to +105°C
Symbol Parameter
Minimum Typical1
Maximum
Units Conditions
V
Power-On Reset Voltage
Threshold
2.20
2.45
2.40
50
2.70
V
V
= V
POR
DD
POR
V
Voltage Brown-Out
Reset Voltage Threshold
2.15
2.65
V
V
= V
VBO
DD
VBO
V
to V
hysteresis
VBO
75
–
mV
V
POR
Starting V voltage to
–
–
V
SS
DD
ensure valid Power-On
Reset.
T
T
Power-On Reset Analog
Delay
50
–
µs
µs
V
> V
; T
Digital
ANA
DD
POR POR
Reset delay follows T
ANA
Power-On Reset Digital
Delay
16
66 Internal Precision
Oscillator cycles + IPO
startup time (T
POR
)
IPOST
T
T
Power-On Reset Digital
Delay
1
ms
µs
5000 Internal Precision
Oscillator cycles
POR
STOP Mode Recovery
with crystal oscillator
disabled
16
66 Internal Precision
Oscillator cycles
SMR
T
STOP Mode Recovery
with crystal oscillator
enabled
1
ms
5000 Internal Precision
Oscillator cycles
SMR
T
T
Voltage Brown-Out
Pulse Rejection Period
V
< V
to generate a
–
10
–
µs
VBO
DD
VBO
Reset.
Time for V to transition
0.10
–
100
ms
RAMP
DD
from V to V
to
SS
POR
ensure valid Reset
T
Stop-Mode Recovery pin
pulse rejection period
20
ns
For any SMR pin or for the
Reset pin when it is asserted
in STOP mode.
SMP
1 Data in the typical column is from characterization at 3.3V and 30°C. These values are provided for
design guidance only and are not tested in production.
PS022815-0206
Electrical Characteristics
ZILOG [ ZILOG, INC. ]
