- 您现在的位置：买卖IC网 > PDF目录223311 > ADSP-21990BSTZ (ANALOG DEVICES INC) High-Performance Mixed-Signal DSP, 160 MHz, 4K Words Program Memory RAM; Package: LQFP 1.4 MM; No of Pins: 176; Temperature Range: Ind PDF资料下载
参数资料
| 型号： | ADSP-21990BSTZ |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 数字信号处理 |
| 英文描述： | High-Performance Mixed-Signal DSP, 160 MHz, 4K Words Program Memory RAM; Package: LQFP 1.4 MM; No of Pins: 176; Temperature Range: Ind |
| 中文描述： | 16-BIT, 160 MHz, OTHER DSP, PQFP176 |
| 封装： | ROHS COMPLIANT, MS-026BGA, LQFP-176 |
| 文件页数： | 47/50页 |
| 文件大小： | 2503K |
| 代理商： | ADSP-21990BSTZ |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页当前第47页第48页第49页第50页
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
相关PDF资料 |
PDF描述 |
|---|---|
| ADSP-BF542BBCZ-4A | 400 MHz Blackfin Embedded Processor: ADSP-BF542BBCZ-4A Temp Range: –40°C to +85°C Package: 400-Ball CSP_BGA BC-400-1 |
| ADSP-BF542BBCZ-5A | 533 MHz Blackfin Embedded Processor: ADSP-BF542BBCZ-5A Temp Range: –40°C to +85°C Package: 400-Ball CSP_BGA BC-400-1 |
| ADSP-BF542MBBCZ-5M | 533 MHz Blackfin Embedded Processor: ADSP-BF542MBBCZ-5M Temp Range: –40°C to +85°C Package: 400-Ball CSP_BGA BC-400-1 |
| ADSP-BF542KBCZ-6A | 600 MHz Blackfin Embedded Processor: ADSP-BF542KBCZ-6A Temp Range: 0°C to +70°C Package: 400-Ball CSP_BGA BC-400-1 |
| ADSP-BF544BBCZ-4A | 400 MHz Blackfin Embedded Processor: ADSP-BF544BBCZ-4A Temp Range: –40°C to +85°C Package: 400-Ball CSP_BGA BC-400-1 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 类别:集成电路 (IC) >> 嵌入式 - DSP（数字式信号处理器） 系列:ADSP-21xx 标准包装:2 系列:StarCore 类型:SC140 内核 接口:DSI，以太网，RS-232 时钟速率:400MHz 非易失内存:外部 芯片上RAM:1.436MB 电压 - 输入/输出:3.30V 电压 - 核心:1.20V 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:431-BFBGA，FCBGA 供应商设备封装:431-FCPBGA（20x20） 包装:托盘 |
| 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 类别:集成电路 (IC) >> 嵌入式 - DSP（数字式信号处理器） 系列:ADSP-21xx 标准包装:2 系列:StarCore 类型:SC140 内核 接口:DSI，以太网，RS-232 时钟速率:400MHz 非易失内存:外部 芯片上RAM:1.436MB 电压 - 输入/输出:3.30V 电压 - 核心:1.20V 工作温度:-40°C ~ 105°C 安装类型:表面贴装 封装/外壳:431-BFBGA，FCBGA 供应商设备封装:431-FCPBGA（20x20） 包装:托盘 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。