參數(shù)資料
型號: ST20GP6
英文描述: MAX 7000 CPLD 256 MC 208-RQFP
中文描述: GPS處理器
文件頁數(shù): 90/116頁
文件大小: 1107K
代理商: ST20GP6
ST20-GP1
90/116
15.4.1 Dreq/Dack protocol
In this mode the 2 control pins
PlinknotReq
(Dreq) and
PlinknotAck
(Dack) are active low. The
initial (inactive) state of the 2 control wires is high.
Dreq/Dack output
The sequence of events for a Dreq/Dack output is outlined below.
1
PlinknotReq
(Dreq), input to ST20, is taken low by the external ASIC.
2
The ST20-GP1 asserts the
PlinknotAck
(Dack) output low. The ASIC can then take
PlinknotReq
(Dreq) high.
3
Following
PlinknotAck
(Dack) going low, the data in the DMA buffer is applied to the output
pins.
PlinknotAck
(Dack) is forced high and the output drivers are tristated. The ASIC can
initiate the next transfer.
Dreq/Dack input
The sequence of events for a Dreq/Dack input is outlined below.
1
PlinknotReq
(Dreq), input to ST20, is taken low by the external ASIC.
2
The ST20-GP1 then asserts the
PlinknotAck
(Dack) output low.
3
The external ASIC applies the data to be transferred to the
PlinkData0-7
pins. The ASIC
can then return
PlinknotReq
(Dreq) high at any time.
4
The data on the input pins is sampled, then
PlinknotAck
(Dack) is forced high.
Figure 15.1 Dreq/Dack protocol
ST20 Output
PlinknotReq
(Dreq)
PlinknotAck
(Dack)
PlinkData0-7
ST20 Input
PlinknotReq
(Dreq)
PlinknotAck
(Dack)
PlinkData0-7
相關(guān)PDF資料
PDF描述
ST25C02AB1 IC FLEX 6000 FPGA 16K 144-TQFP
ST25C02AB6 Stratix FPGA 25K FBGA-672
ST25C02AM1 IC ACEX 1K FPGA 100K 208-PQFP
ST25C02AM6 Cyclone II FPGA 20K FBGA-256
ST25C04ML1 IC FLEX 6000 FPGA 24K 144-TQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST20-GP6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR
ST20GP6CT33S 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR
ST20GP6CX33S 功能描述:射頻無線雜項 GPS Processor RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel
ST20GP6CX33STR 功能描述:射頻無線雜項 GPS Processor RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel
ST20GP6X33S 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR