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LPC804 Datasheet(PDF) 68 Page - NXP Semiconductors

Part # LPC804
Description  32-bit Arm짰 Cortex짰-M0 microcontroller; up to 32 KB flash and 4 KB SRAM; 12-bit ADC; Comparator; 10-bit DAC; Capacitive Touch Interface; Programmable Logic Unit
PDF  89 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

LPC804 Datasheet(HTML) 68 Page - NXP Semiconductors

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LPC804
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2021. All rights reserved.
Product data sheet
Rev. 2.0 — 21 September 2021
68 of 87
NXP Semiconductors
LPC804
32-bit Arm Cortex-M0+ microcontroller
15. Application information
15.1 Start-up behavior
Figure 33 shows the start-up timing after reset. The FRO 12 MHz oscillator provides the
default clock at Reset and provides a clean system clock shortly after the supply pins
reach operating voltage.
15.2 Connecting power, clocks, and debug functions
Figure 34 shows the basic board connections used to power the LPC804 and provide
debug capabilities via the serial wire port.
Fig 33. Start-up timing
Table 31.
Typical start-up timing parameters
Parameter
Description
Value
ta
FRO start time
 26 s
tb
Internal reset de-asserted
101
s
tc
Boot time
36
s
aaa-028455
valid threshold
= 1.71 V
processor status
VDD
FRO status
internal reset
GND
boot time
user code
boot code
execution
finishes;
user code starts
FRO
starts
supply ramp-up
time
tb μs
ta μs
tc μs



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