User's Manual

PR533_SDS All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product short data sheet
COMPANY PUBLIC
Rev. 3.6 — 27 October 2014
206436 26 of 36
NXP Semiconductors
PR533
USB NFC integrated reader solution
10.22 System reset timing
[1] Dependent on the 27.12 MHz crystal oscillator startup time.
[2] If the t
rst
pulse is shorter than 20 ns, the device may be only partially reset.
Fig 6. System reset overview
t
w(rst)
t
rst
V
th(rst)reg +
V
th(rst)reg(hys)
V
th(rst)reg(hys)
V
DD(PVDD)
RSTPD_N
RSTOUT_N
t
POR
001aao394
Table 34. Reset duration time
Symbol Parameter Conditions Min Typ Max Unit
t
POR
power-on reset time
[1]
0.1 0.4 2 ms
t
rst
reset time hard power-down time; user dependent
[2]
20 - - ns
t
w(rst)
reset pulse width reset time when RSTPD_N is released
[1]
0.1 0.4 2 ms