W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 154

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.4 PWROK Generation
The PWROK (Pin 71) signal is an output and is used as both the 5VCC and 3VCC power-on reset
signal.
When the W83627UHG detects both of the 5VCC and 3VCC voltages rise to “V3” and “V5”, it then
starts a delay – “t2” before the rising edge of PWROK assertion. If both of the 5VCC and 3VCC
voltages fall below “V4” and “V6”, the PWROK de-asserts immediately.
Timing and the voltage parameters are shown in Figure 13-4 and Table 13-4.
NAME
V1
V2
t1
PWROK
5VCC
3VCC
5VSB
RSMRST#
5VSB Valid Voltage
5VSB Ineffective Voltage
Valid 5VSB to RSMRST# inactive
V1
V3
V5
t1
Table 13-3 Timing and Voltage Parameters of RSMRST#
t2
Figure 13-3 Mechanism of Resume Reset Logic
Figure 13-4 PWROK Generation Mechanism
PARAMETER
-143-
Publication Release Date: May 25, 2007
MIN.
100
2.6
-
V4
V6
W83627UHG
MAX.
200
4.3
-
V2
Revision 1.0
UNIT
mS
V
V