mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 219

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

5.3.4
Block LVR monitors the primary output voltage V
LVR asserts and when rising above the deassertion level (V
function is available only in full-performance mode.
5.3.5
This part contains digital functionality needed to control the operating modes.
5.4
This subsection describes how VREG3V3V2 controls the reset of the CC. The reset values of registers and
signals are provided in
listed in
5.4.1
During chip power-up the digital core may not work if its supply voltage V
deassertion level (V
is kept high until V
continues the start-up sequence.
5.4.2
For information on low-voltage reset see
Freescale Semiconductor
Table
Resets
LVR — Low Voltage Reset
CTRL — Regulator Control
Power On Reset
Low Voltage Reset
5-2.
Power-on reset
Low-voltage reset
DD
PORD
Reset Source
exceeds V
Section 3.3, “Memory Map and Register
). Therefore, signal POR, which forces the other blocks of the device into reset,
Table 5-2. VREG3V3V2 — Reset Sources
PORD
. Then POR becomes low and the reset generator of the device
MFR4300 Data Sheet, Rev. 3
Always active
Always active
Section 5.3.4, “LVR — Low Voltage
DD
. If it drops below the assertion level (V
Local Enable
LVRD
Description”. Possible reset sources are
) signal LVR deasserts again. The LVR
Dual Output Voltage Regulator (VREG3V3V2)
DD
is below the POR
Reset”.
LVRA
) signal
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