Datasheet

LPC12D27 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 1 — 20 September 2011 33 of 46
NXP Semiconductors
LPC12D27
32-bit ARM Cortex-M0 microcontroller
11. Dynamic characteristics
11.1 Power-up ramp conditions
[1] See Figure 19.
[2] The wait time specifies the time the power supply must be at levels below 400 mV before ramping up.
Table 11. Power-up characteristics
T
amb
= 40 C to +85 C.
Symbol Parameter Conditions Min Typ Max Unit
t
r
rise time at t = t
1
: 0 < V
I
 400 mV
[1]
0- 500 ms
t
wait
wait time
[1][2]
12 - - s
V
I
input voltage at t = t
1
on pin V
DD
0 - 400 mV
Condition: 0 < V
I
 400 mV at start of power-up (t = t
1
)
Fig 19. Power-up ramp
V
DD
0
400 mV
t
r
t
wait
t = t
1
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