OM13001,598 NXP Semiconductors, OM13001,598 Datasheet - Page 66
![EA LPC177X/8X EVAL BOARD](/photos/40/8/400885/om13001_598_sml.jpg)
OM13001,598
Manufacturer Part Number
OM13001,598
Description
EA LPC177X/8X EVAL BOARD
Manufacturer
NXP Semiconductors
Series
-r
Type
MCUr
Specifications of OM13001,598
Contents
Board, Cable, Headphones, Registration Card
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
LPC1788
Other names
568-6707
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NXP Semiconductors
LPC178X_7X
Objective data sheet
7.34.1 Reset
7.34 System control
The second option uses two power supplies; a 3.3 V supply for the I/O pads (V
a dedicated 3.3 V supply for the CPU (V
powered independently from the I/O pad ring enables shutting down of the I/O pad power
supply “on the fly”, while the CPU and peripherals stay active.
The VBAT pin supplies power only to the RTC domain. The RTC requires a minimum of
power to operate, which can be supplied by an external battery. The device core power
(V
there is no power drain from the RTC battery when V
Reset has four sources on the LPC178x/7x: the RESET pin, the Watchdog reset,
Power-On Reset (POR), and the BrownOut Detection (BOD) circuit. The RESET pin is a
Schmitt trigger input pin. Assertion of chip Reset by any source, once the operating
voltage attains a usable level, starts the Wake-up timer (see description in
Fig 8.
DD(REG)(3V3)
Power distribution
V
DD(REG)(3V3)
) is used to operate the RTC whenever V
All information provided in this document is subject to legal disclaimers.
V
DD(3V3)
VREFP
RTCX1
RTCX2
VBAT
V
V
V
DDA
SSA
SS
Rev. 2 — 27 May 2011
LPC178x/7x
RTC POWER DOMAIN
ADC POWER DOMAIN
MAIN POWER DOMAIN
OSCILLATOR
SELECTOR
to I/O pads
POWER
32 kHz
DD(REG)(3V3)
REGULATOR
32-bit ARM Cortex-M3 microcontroller
REGULATOR
ULTRA-LOW
). Having the on-chip voltage regulator
POWER
DD(REG)(3V3)
DD(REG)(3V3)
BACKUP REGISTERS
DAC
ADC
REAL-TIME CLOCK
to core
to memories,
peripherals,
oscillators,
PLLs
LPC178x/7x
is available.
is present. Therefore,
002aaf530
© NXP B.V. 2011. All rights reserved.
DD(3V3)
66 of 117
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