pc87317vul National Semiconductor Corporation, pc87317vul Datasheet - Page 267

• Manufacturer Part Number: pc87317vul
• Description: Pc87317vul/pc97317vul Superi/o Plug And Play Compatible With Acpi Compliant Controller/extender
• Manufacturer: National Semiconductor Corporation

14.3.22 Chip Select Timing
14.3.23 LED Timing
Cycle time: 1 sec +/- 0.1 sec, 40% -60% duty cycle
A15-1, AEN
LED
WR (APCR4
register,
Bank 2 of
RTC and APC)
WR, RD
CS1,0
V
HI-Z
t
t
t
CE
CD
WRL
OL
Symbol
Symbol
Delay from Command to Enable Chip Select
Delay from Command to Disable Chip Select
Write-strobe to valid LED
FIGURE 14-37. Chip Select Timing
t
TABLE 14-72. Chip Select Timing
CE
FIGURE 14-38. LED Timing
Parameter
Parameter
TABLE 14-73. LED Timing
Device Specifications
267
t
Min
Min
WRL
0
0
0
Max
Max
25
25
80
t
CD
nsec
nsec
nsec
Unit
Unit
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