AT94K05AL-25AQC Atmel, AT94K05AL-25AQC Datasheet - Page 90
AT94K05AL-25AQC
Manufacturer Part Number
AT94K05AL-25AQC
Description
Manufacturer
Atmel
Datasheet
1.AT94K05AL-25AQC.pdf
(204 pages)
Specifications of AT94K05AL-25AQC
Device System Gates
5000
Propagation Delay Time
12.1ns
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Commercial
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Mounting
Surface Mount
Pin Count
100
Package Type
PQFP
Lead Free Status / RoHS Status
Not Compliant
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4.25
90
8-bit Timers/Counters T/C0 and T/C2
AT94KAL Series FPSLIC
Figure 4-26. Timer/Counter2 Prescaler
Special Function I/O Register – SFIOR
• Bits 7..2 - Res: Reserved Bits
These bits are reserved bits in the FPSLIC and are always read as zero.
• Bit 1 - PSR2: Prescaler Reset Timer/Counter2
When this bit is set (one) the Timer/Counter2 prescaler will be reset. The bit will be cleared by
the hardware after the operation is performed. Writing a zero to this bit will have no effect. This
bit will always be read as zero if Timer/Counter2 is clocked by the internal CPU clock. If this bit is
written when Timer/Counter2 is operating in asynchronous mode; however, the bit will remain as
one until the prescaler has been reset. See
page 99
• Bit 0 - PSR10: Prescaler Reset Timer/Counter1 and Timer/Counter0
When this bit is set (one) the Timer/Counter1 and Timer/Counter0 prescaler will be reset. The bit
will be cleared by the hardware after the operation is performed. Writing a zero to this bit will
have no effect. Note that Timer/Counter1 and Timer/Counter0 share the same prescaler and a
reset of this prescaler will affect both timers. This bit will always be read as zero.
Figure 4-27
for Timer/Counter2.
Bit
$30 ($50)
Read/Write
Initial Value
TOSC1
for a detailed description of asynchronous operation.
PSR2
CS20
CS21
CS22
AS2
CK
shows the block diagram for Timer/Counter0.
7
-
R
0
6
-
R
0
PCK2
5
-
R
0
Clear
4
-
R
0
TIMER/COUNTER2 CLOCK SOURCE
“Asynchronous Operation of Timer/Counter2” on
3
-
R
0
0
10-BIT T/C PRESCALER
TCK2
2
-
R
0
Figure 4-28
1
PSR2
R/W
0
shows the block diagram
0
PSR10
R/W
0
SFIOR
1138I–FPSLI–1/08
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