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| 型號(hào)： | SPAKDSP321VL240 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 42/84頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DSP 24BIT 240MHZ 196-MAPBGA |
| 標(biāo)準(zhǔn)包裝： | 2 |
| 系列： | DSP56K/Symphony |
| 類型： | 定點(diǎn) |
| 接口： | 主機(jī)接口，SSI，SCI |
| 時(shí)鐘速率： | 240MHz |
| 非易失內(nèi)存： | ROM（576 B） |
| 芯片上RAM： | 576kB |
| 電壓 - 輸入/輸出： | 3.30V |
| 電壓 - 核心： | 1.60V |
| 工作溫度： | -40°C ~ 100°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 196-LBGA |
| 供應(yīng)商設(shè)備封裝： | 196-MAPBGA（15x15） |
| 包裝： | 托盤 |
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AC Electrical Characteristics
DSP56321 Technical Data, Rev. 11
Freescale Semiconductor
2-27
2.4.10 Considerations For GPIO Use
The following considerations can be helpful when GPIO is used.
2.4.10.1 GPIO as Output
The time from fetch of the instruction that changes the GPIO pin to the actual change is seven core clock
cycles, if the instruction is a one-cycle instruction and there are no pipeline stalls or any other pipeline
delays.
The maximum rise or fall time of a GPIO pin is 13 ns (TTL levels, assuming that the maximum of 50 pF
load limit is met).
2.4.10.2 GPIO as Input
GPIO inputs are not synchronized with the core clock. When only one GPIO bit is polled, this lack of
synchronization presents no problem, since the read value can be either the previous value or the new value of the
corresponding GPIO pin. However, there is the risk of reading an intermediate state if:
Two or more GPIO bits are treated as a coupled group (for example, four possible status states encoded in
two bits).
The read operation occurs during a simultaneous change of GPIO pins (for example, the change of 00 to 11
may happen through an intermediate state of 01 or 10).
Therefore, when GPIO bits are read, the recommended practice is to poll continuously until two consecutive read
operations have identical results.
Figure 2-26.
TIO Timer Event Input Restrictions
Figure 2-27.
Timer Interrupt Generation
TIO
481
480
TIO (Input)
First Interrupt Instruction Execution
Address
486
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| SPAKDSP321VL275 | 功能描述:IC DSP 24BIT 275MHZ 196-MAPBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號(hào)處理器） 系列:DSP56K/Symphony 標(biāo)準(zhǔn)包裝:40 系列:TMS320DM64x, DaVinci™ 類型:定點(diǎn) 接口:I²C，McASP，McBSP 時(shí)鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:160kB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:0°C ~ 90°C 安裝類型:表面貼裝 封裝/外殼:548-BBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:548-FCBGA（27x27） 包裝:托盤 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA |
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