mc56f801 Freescale Semiconductor, Inc, mc56f801 Datasheet - Page 96

• Manufacturer Part Number: mc56f801
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

10.2.1
The 56F8014 has two on-chip regulators. One supplies the PLL and relaxation oscillator. It has no external
pins and therefore has no external characteristics which must be guaranteed (other than proper operation
of the device). The second regulator supplies approximately 2.5V to the 56F8014’s core logic. This
regulator requires an external 4.4
capacitors tend to provide better performance tolerances. The output voltage can be measured directly on
the V
10.3 AC Electrical Characteristics
Tests are conducted using the input levels specified in
propagation delays are measured from the 50% to the 50% point, and rise and fall times are measured
between the 10% and 90% points, as shown in
96
Input Voltage
Output Voltage
Short Circuit Current
Short Circuit Tolerance
(output shorted to ground)
CAP
1. When V
2. When V
3. Power-On Reset occurs whenever the internally regulated 2.5V digital supply drops below 1.8V. While
Low-Voltage Interrupt for 3.3V supply
Low-Voltage Interrupt for 2.5V supply
Low-Voltage Interrupt Recovery Hysteresis
Power-On Reset
pin. The specifications for this regulator are shown in
power is ramping up, this signal remains active for as long as the internal 2.5V is below 2.15V or the 3.3V
1/O voltage is below 2.7V, no matter how long the ramp-up rate is. The internally regulated voltage is
typically 100mV less than V
Voltage Regulator Specifications
Characteristic
DD
DD
drops below V
drops below V
Table 10-7 Power-On Reset Low-Voltage Parameters
Characteristic
3
EI3.3
EI32.5
Table 10-8. Regulator Parameters
DD
μ
, an interrupt is generated.
, an interrupt is generated.
during ramp-up until 2.5V is reached, at which time it self-regulates.
F, or greater, capacitor for proper operation. Ceramic and tantalum
56F8014 Technical Data, Rev. 9
1
2
Symbol
V
T
V
I
RSC
OUT
SS
IN
Figure
Symbol
V
V
POR
V
E12.5
EI3.3
EIH
10-2.
2.25
Min
3.0
—
—
2.60
2.05
Min
Table
—
—
Table
Typical
450
2.5
—
—
10-5. Unless otherwise specified,
10-8.
2.15
Typ
2.7
1.8
50
Max
2.75
650
3.6
30
Max
1.9
—
—
—
Freescale Semiconductor
Unit
mV
V
V
V
Minutes
Unit
mA
V
V
Preliminary