MMA16XXKW FREESCALE [Freescale Semiconductor, Inc], MMA16XXKW Datasheet - Page 18

• Manufacturer Part Number: MMA16XXKW
• Description: DSI Inertial Sensor
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

18
3.3
regulators for the analog (V
HCAP and internal voltages have stabilized sufficiently for proper operation. The voltage monitor asserts internal reset when the
HCAP supply or internally regulated voltages fall below predetermined levels. A reference generator provides a stable voltage
which is used by the
3.3.1
stability.
3.3.2
Section
MMA16xxKW
HCAP
The device derives its internal supply voltage from the HCAP supply voltage. The device includes separate internal voltage
The voltage regulator module includes voltage monitoring circuitry which holds the device in reset following power-on until the
The internal regulator requires an external capacitor between the C
The device includes a circuit to monitor the voltage on the HCAP pin. If the voltage falls below the specified threshold in
2, the device will be reset within the reset delay time (t
Figure 1
Voltage Regulators
C
V
HCAP
REG
and C
shows the recommended types and values for each of these capacitors.
Voltage Monitor
REFERENCE
BANDGAP
V
HCAP
V
REGA
V
REGULATOR
converter.
REGA
REG
REF
VOLTAGE
REGA
Regulator Capacitor
V
) and digital circuitry (V
REGA
V
REF
V
Figure 9. Voltage Regulation and Monitoring
BUF
COMPARATOR
COMPARATOR
COMPARATOR
REGULATOR
VOLTAGE
V
REGULATOR
BUF
VOLTAGE
GENERATOR
REG
REFERENCE
). External filter capacitors are required, as shown in
HCAP_POR
Analog Filter Delay
Analog Filter Delay
Digital Delay
t
t
t
VREG_POR
VREG_POR
HCAP_POR
V
REG
REG
V
GENERATOR
= 2.50 V
) specified in
REF_MOD
pin and V
TRIM
BIAS
= 1.250 V
SS
Section
pin, and the C
V
OSCILLATOR
CONVERTER
2.7.
REGA
DIGITAL
Freescale Semiconductor, Inc.
ARRAY
LOGIC
TRIM
OTP
DSP
= 2.50 V
POR
REGA
pin and V
Figure
C
C
REGA
REG
SSA
Sensors
1.
pin for