參數(shù)資料
型號： IDT88K8483BRI
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 128/162頁
文件大?。?/td> 0K
描述： IC SPI-4 EXCHANGE 3PORT 672-BGA
標(biāo)準(zhǔn)包裝： 24
系列： *
其它名稱： 88K8483BRI
68 of 162
October 20, 2006
IDT IDT88K8483
Time base
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
PMON 1ms Timer Register (p. 145). The internal time base can be generated by a free running timer or OBC according to the TIMER field in the
PMON 1ms Timer Register (p. 145). The time base sources are described in the Table 8.
Table 8
Time Base Source
Internal PMON Time Base
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
generated based on the 1ms timer, and forwarded to the interrupt module and to the internal embedded processor.
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
PMON 1ms Timer Register (p. 145) generates a time base trigger. The one second is generated based on the 1ms timer.
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-
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 Figure 34.
Figure 34 Internal PMON Time Base
External PMON Time Base
A positive edge on the TIMEBASE pin generates an externally time base trigger. The time base trigger updates the PMON counters, and gener-
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 Figure 35.
[INTERNAL, TIMER, MANUAL]
Time base trigger source
3’b0xx
The time base is generated externally.
3’b11x
The internal time base is generated by a free running
timer.
3’b10x
The internal time base is generated by OBC.
Timebase trigger
TIMEBASE interrupt
Signal to TIMEBASE pin
3-4ms for PMON updating
16 MCLK
cycles
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IDT88P8341BHI 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:否 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝
IDT88P8342BHGI 功能描述:IC SPI3-SPI4 EXCHANGE 820-PBGA RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝
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IDT88P8344 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:SPI EXCHANGE 4 x SPI-3 TO SPI-4 Issue 1.0
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