- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1900 > ADSP-21990BSTZ (Analog Devices Inc)IC DSP CONTROLLER 16BIT 176-LQFP PDF資料下載
參數(shù)資料
| 型號： | ADSP-21990BSTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 47/50頁 |
| 文件大小： | 0K |
| 描述： | IC DSP CONTROLLER 16BIT 176-LQFP |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ADSP-21xx |
| 類型： | 定點 |
| 接口： | SPI，SSP |
| 時鐘速率： | 160MHz |
| 非易失內(nèi)存： | 外部 |
| 芯片上RAM： | 20kB |
| 電壓 - 輸入/輸出： | 3.30V |
| 電壓 - 核心： | 2.50V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 176-LQFP |
| 供應(yīng)商設(shè)備封裝： | 176-LQFP（24x24） |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁當(dāng)前第47頁第48頁第49頁第50頁
Rev. A
|
Page 6 of 50
|
August 2007
ADSP-21990
the external memory access strobe widths. For more informa-
tion, see Clock Signals on Page 12. The off-chip memory
spaces are:
External memory space (MS3–0 pins)
I/O memory space (IOMS pin)
Boot memory space (BMS pin)
All of the above off-chip memory spaces are accessible through
the external port, which can be configured for 8-bit or 16-bit
data widths.
External Memory Space
External memory space consists of four memory banks. These
banks can contain a configurable number of 64 K word pages.
At reset, the page boundaries for external memory have Bank0
containing Pages 1 to 63, Bank1 containing Pages 64 to 127,
Bank2 containing Pages 128 to 191, and Bank3 containing Pages
192 to 254. The MS3-0 memory bank pins select Banks 3-0,
respectively. Both the ADSP-2199x core and DMA capable
peripherals can access the DSP external memory space.
All accesses to external memory are managed by the external
memory interface unit (EMI).
I/O Memory Space
The ADSP-21990 supports an additional external memory
called I/O memory space. The I/O space consists of 256 pages,
each containing 1024 addresses. This space is designed to sup-
port simple connections to peripherals (such as data converters
and external registers) or to bus interface ASIC data registers.
The first 32K addresses (I/O Pages 0 to 31) are reserved for
on-chip peripherals. The upper 224K addresses (I/O Pages 32 to
255) are available for external peripheral devices. External I/O
pages have their own select pin (IOMS). The DSP instruction set
provides instructions for accessing I/O space.
Boot Memory Space
Boot memory space consists of one off-chip bank with 254
pages. The BMS memory bank pin selects boot memory space.
Both the ADSP-2199x core and DMA capable peripherals can
access the DSP off-chip boot memory space. After reset, the
DSP always starts executing instructions from the on-chip
boot ROM.
BUS REQUEST AND BUS GRANT
The ADSP-21990 can relinquish control of the data and address
buses to an external device. When the external device requires
access to the bus, it asserts the bus request (BR) signal. The (BR)
signal is arbitrated with core and peripheral requests. External
bus requests have the lowest priority. If no other internal
request is pending, the external bus request will be granted. Due
to synchronizer and arbitration delays, bus grants will be pro-
vided with a minimum of three peripheral clock delays. The
ADSP-21990 will respond to the bus grant by:
Three-stating the data and address buses and the MS3–0,
BMS, IOMS, RD, and WR output drivers.
Asserting the bus grant (BG) signal.
The ADSP-21990 will halt program execution if the bus is
granted to an external device and an instruction fetch or data
read/write request is made to external general-purpose or
peripheral memory spaces. If an instruction requires two exter-
nal memory read accesses, the bus will not be granted between
the two accesses. If an instruction requires an external memory
read and an external memory write access, the bus may be
granted between the two accesses. The external memory inter-
face can be configured so that the core will have exclusive use of
the interface. DMA and bus requests will be granted. When the
external device releases BR, the DSP releases BG and continues
program execution from the point at which it stopped.
The bus request feature operates at all times, even while the DSP
is booting and RESET is active.
The ADSP-21990 asserts the BGH pin when it is ready to start
another external port access, but is held off because the bus was
previously granted. This mechanism can be extended to define
more complex arbitration protocols for implementing more
elaborate multimaster systems.
DMA CONTROLLER
The ADSP-21990 has a DMA controller that supports auto-
mated data transfers with minimal overhead for the DSP core.
Cycle stealing DMA transfers can occur between the
ADSP-21990 internal memory and any of its DMA capable
peripherals. Additionally, DMA transfers can be accomplished
between any of the DMA capable peripherals and external
Figure 4. I/O Memory Map
ON-CHIP
PERIPHERALS
16-BITS
OFF-CHIP
PERIPHERALS
16-BITS
PAGES 0 TO 31
1024 WORDS/PAGE
2 PERIPHERALS/PAGE
0x00::0x000
0x20::0x000
0xFF::0x3FF
0x1F::0x3FF
PAGES 32 TO 255
1024 WORDS/PAGE
Figure 5. Boot Memory Map
PAGES 1 TO 254
64K WORDS/PAGE
0x01 0000
0xFE 0000
OFF-CHIP
BOOT MEMORY
16-BITS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADSP-21991BSTZ | IC DSP CONTROLLER 16BIT 176-LQFP |
| ADSP-21992YBC | IC DSP CTLR 16BIT 196CSPBGA |
| ADSP-3PARCBF548M01 | MODULE BOARD BF548 |
| ADSP-BF506KSWZ-4F | IC DSP 12BIT 400MHZ 120LQFP |
| ADSP-BF518BSWZ-4F4 | IC DSP 16/32B 400MHZ LP 176LQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-21991BBC | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 150MHz 150MIPS 196-Pin Mini-BGA |
| ADSP-21991BBCZ | 功能描述:IC DSP CTLR 16BIT 196CSPBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標(biāo)準(zhǔn)包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-21991BST | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 160MHz 160MIPS 176-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:HIGH PERFORMANCE MIXED SIGNAL DSP - Bulk |
| ADSP-21991BSTZ | 功能描述:IC DSP CONTROLLER 16BIT 176-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標(biāo)準(zhǔn)包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-21992BBC | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 150MHz 150MIPS 196-Pin CSP-BGA 制造商:Rochester Electronics LLC 功能描述:MIXED SIGNAL DSP W/32K DM RAM& 16K PMRAM - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。