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Operating System Timer—Intel
18.5.15
General-Purpose Timer 1 Configuration Register
Register Name:
Physical Address:
Register Description:
Access: Read/Write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Register
Bits
Name
31:4
(Reserved)
3
tim1_pause_en
2
tim1_scale_en
1
tim1_bit1
0
tim1_bit1
18.5.16
General-Purpose Timer 1 Prescale Register
Register Name:
Physical Address:
Register Description:
Access: Read/Write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
(Reserved)
Register
Bits
Name
31:1
(Reserved)
6
Contains the divide factor for timer1. The usable range is 2 - 65,535.
The generated frequency equals apb_clk divided by the divide factor,
15:0
tim1_presc
which is N+1, so when tim0_presc = 0x01 it is divide by 2. The
prescaling starts when the field is written with a value other than 0x00
August 2006
Order Number: 306262-004US
®
®
IXP45X and Intel
IXP46X Product Line of Network Processors
0xC8005038
General-Purpose Timer 1Configuration
(Reserved)
If '0' the timer1 counter is running, when '1' the counter is stopped.
Only when the prescale/scale_en is active. This bit has no effect if the
timer uses apb_clk.
If this field is '1', the 3/4 scale is enabled. It will make timer1 count
with 3/4 of the frequency the timer1 is driven by. If no prescaler is
used, it will be 3/4 of the apb_clk.
This is bit 1 in a higher granularity for the reload counter for tim1.
This is bit 0 in a higher granularity for the reload counter for tim1.
0xC800503C
General-Purpose Timer 1Prescale Register
Description
ost_tim1_cfg
Reset Hex Value:
ost_tim1_cfg
Description
ost_tim1_pre
Reset Hex Value:
ost_tim1_pre
§ §
®
®
Intel
IXP45X and Intel
0x00000000
8
7
6
5
4
3
Reset
Value
28'd0
0
0
0
0
0x00000000
8
7
6
5
4
3
tim1_presc
Reset
Value
16'h0000
16'h0000
IXP46X Product Line of Network Processors
Developer's Manual
2
1
0
Access
Read
RW
RW
RW
RW
2
1
0
Access
Read
RW
829
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