EP80579 Datasheet, PDF (1147/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 31-4. Offset 40h: TSB[0-2] - Interval Timer Status Byte Format Register
Description:
These I/O ports can
Section 31.2.1.1).
also
function
as
TCAP
(see
Section
31.2.1.3)
based
on
the
settings
of
TCW
(see
View: IA F
Base Address: 0000h (IO)
Offset Start: 40h at 01h
Offset End: 40h at 01h
Size: 8 bit
Default: 0XXXXXXXb
Power Well: Core
Bit Range
7
6
05 :04
03 :01
00
Bit Acronym
Bit Description
Sticky
COPS
CRS
RWSS
MSS
CTS
Counter OUT Pin State:
0 = The OUT pin of the counter is a 0
1= The OUT pin of the counter is a 1
Count Register Status: This bit indicates when the last
count written to the Count Register (CR) has been loaded
into the counting element (CE). The exact time this
happens depends on the counter mode, but until the count
is loaded into the counting element (CE), the count value
is incorrect.
0 = Count has been transferred from CR to CE and is
available for reading.
1 = Null Count. Count has not been transferred from CR to
CE and is not yet available for reading.
Read/Write Selection Status: These reflect the read/
write selection made through bits[05:04] of the control
register. The binary codes returned during the status read
match the codes used to program the counter read/write
selection.
00 Counter Latch Command
01 Read/Write Least Significant Byte (LSB)
10 Read/Write Most Significant Byte (MSB)
11 Read/Write LSB then MSB
Mode Selection Status: These bits return the counter
mode programming. The binary code returned matches
the code used to program the counter mode, as listed
under the bit function above.
000 0 Out signal on end of count (=0)
001 1 Hardware retriggerable one-shot
x10 2 Rate generator (divide by n counter)
x11 3 Square wave output
100 4 Software triggered strobe
101 5 Hardware triggered strobe
Countdown Type Status: This bit reflects the current
countdown type; ether 0 for binary countdown or a 1 for
binary coded decimal (BCD) countdown.
Bit Reset
Value
0b
Xb
XXb
XXXb
Xb
Bit Access
RO
RO
RO
RO
RO
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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