IDT88K8483BRI IDT, Integrated Device Technology Inc, IDT88K8483BRI Datasheet - Page 68
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IDT88K8483BRI
Manufacturer Part Number
IDT88K8483BRI
Description
IC SPI-4 EXCHANGE 3PORT 672-BGA
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.IDT88K8483BRI.pdf
(162 pages)
Specifications of IDT88K8483BRI
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
88K8483BRI
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Time base
PMON 1ms Timer Register (p.
PMON 1ms Timer Register (p.
Internal PMON Time Base
generated based on the 1ms timer, and forwarded to the interrupt module and to the internal embedded processor.
PMON 1ms Timer Register (p. 145)
ates a TIMEBASE interrupt event to the interrupt module. The delay between the time base trigger and the TIMEBASE interrupt event is 3 to 4ms.
Subsequent trigger is ignored during the this period. The internal PMON time base wave form is shown in
External PMON Time Base
ates a TIMEBASE interrupt to the interrupt module. The delay between the time base trigger and the TIMEBASE event is 3 to 4 ms. Subsequent
trigger is ignored during this period. The external PMON time base wave form is shown in
IDT IDT88K8483
A single PMON time base is provided for the device. The time base can be generated internally or externally according to the INTERNAL field in
The device has a 1ms accurate timer. The 1ms timer register specifies the number of MCLK for generating 1ms time intervals. A 10ms event is
In internal timer mode, the device generates one time base trigger in each second. In internal OBC mode, writing 1 to the MANUAL field in the
The time base trigger generates a 16-MCLK high pulse to TIMEBASE pin, and it updates the PMON counters. The time base trigger also gener-
A positive edge on the TIMEBASE pin generates an externally time base trigger. The time base trigger updates the PMON counters, and gener-
Signal to TIMEBASE pin
TIMEBASE interrupt
Timebase trigger
3’b0xx
3’b11x
3’b10x
[INTERNAL, TIMER, MANUAL]
145). The time base sources are described in the
145). The internal time base can be generated by a free running timer or OBC according to the TIMER field in the
generates a time base trigger. The one second is generated based on the 1ms timer.
3-4ms for PMON updating
Figure 34 Internal PMON Time Base
Table 8
Time Base Source
68 of 162
16 MCLK
The time base is generated externally.
The internal time base is generated by a free running
timer.
The internal time base is generated by OBC.
cycles
Table
Time base trigger source
8.
Figure 35.
Figure 34.
October 20, 2006
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