Samsung RT55EANS Spezifikationen PDF herunterladen (Seite 33)

Ref# 420826 Intel

Atom™ processor CE4100 33

Platform Design Guide

Intel Confidential

4.5 Reset Sequence

RESET_INB and SYS_PWR_GOOD signals are all 3.3V power well input signals and used to

initiate a reset sequence for the Intel

Atom™ processor CE4100. The Intel

Atom™

processor CE4100 releases RESET_OUTB to show IA core is out of reset.

PWROK signal is not used on the Intel

Atom™ processor CE4100. This signal can be

connected to ground directly.

RESET_INB

RESET_INB is an active low chip reset signal. This signal must be driven to 3.3 V for a logic

1. This signal should still be driven when in standby mode.

Table 4-2. Layout Recommendations for RESET_INB

Signal

Name

Impedance

Width (W) / Spacing (S) Layer Figure Notes

RESET_INB 55 Ω ±10% W = 4 mils S = 12 mils Microstrip Figure 5-1 1

Note: 1. W represents width of signal; S represents spacing to any other signal.

SYS_PWR_GOOD

SYS_PWR_GOOD is a 3.3V input signal to indicate that all the power rails and clocks are

valid. The Rising edge of this signal is used to latch values of the strap inputs.

Table 4-3. Layout Recommendations for SYS_PWR_GOOD

Signal Name Impedance

Width (W) / Spacing (S) Layer Notes

SYS_PWR_GOOD 55 Ω ±10% W = 4 mils S = 12 mils Figure 5-1 1

Note: 1. W represents width of signal; S represents spacing to any other signal

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 137 138

Keine Kommentare

Samsung RT55EANS Spezifikationen Seite 33