Intel C2518 FH8065501516710 Data Sheet

Product codes
FH8065501516710
Page of 746
Intel
®
 Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
531
Volume 2—8254 Programmable Interval Timer (PIT)—C2000 Product Family
Architectural Overview
27.3.1.2
Counter Latch Command
This command latches the current count value and ensures the count read from the 
counter is accurate. The count value is then read from each counter count register 
through the Counter Ports Access Ports Register (40h for counter 0, 41h for counter 1, 
and 42h for counter 2). The count must be read according to the programmed format, 
i.e., if the counter is programmed for 2-byte counts, 2 bytes must be read.
The 2 bytes do not have to be read one right after the other (read, write, or 
programming operations for other counters are inserted between the reads). If a 
counter is latched once and then latched again before the count is read, the second 
Counter Latch command is ignored.
See 
 for additional 
programming information.