PNX1700EH/G,557 Trident Microsystems, Inc., PNX1700EH/G,557 Datasheet - Page 149

• Manufacturer Part Number: PNX1700EH/G,557
• Manufacturer: Trident Microsystems, Inc.

Specifications of PNX1700EH/G,557

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
3.2 The Software Timing
Whenever a watchdog timer time-out occurs or when a software reset is requested by
writing to the RST_CTL.DO_SW_RST bit the PNX17xx Series system is reset. Both
are referred as software reset. As seen in the previous
hold the POR_IN_N or the RESET_IN_N signal for at least 100 s. Therefore the
software reset mechanism implements an internal counter that allows to assert the
peri_rst_n signal for 100 s. Similarly to the hardware reset the sys_rst_out_n is also
asserted until the TM5250 CPU releases it. The internal counter uses the initial 27
MHz to estimate 100 s.
Rev. 1 — 17 March 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Section 3.1
PNX17xx Series
Chapter 4: Reset
it is required to
4-8