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參數(shù)資料
| 型號(hào)： | ADSP-2171 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | DSP Microcomputer(DSP 微計(jì)算機(jī)) |
| 中文描述： | 微機(jī)的DSP（數(shù)字信號(hào)處理器微計(jì)算機(jī)） |
| 文件頁數(shù)： | 7/52頁 |
| 文件大?。?/td> | 685K |
| 代理商： | ADSP-2171 |
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ADSP-2171/ADSP-2172/ADSP-2173
REV. A
–7–
Figure 3. ADSP-217x Basic System Configuration
Because the ADSP-217x includes an on-chip oscillator circuit,
an external crystal may be used. T he crystal should be con-
nected across the CLK IN and X T AL pins, with two capacitors
connected as shown in Figure 4. A parallel-resonant, fundamen-
tal frequency, microprocessor-grade crystal should be used.
CLKIN
CLKOUT
XTAL
ADSP-217x
Figure 4. External Crystal Connections
A clock output (CLK OUT ) signal is generated by the processor
at the processor’s cycle rate. T his can be enabled and disabled
by the CLK ODIS bit in the SPORT 0 Autobuffer Control Reg-
ister, DM[0x3FF3].
Reset
T he
RESET
signal initiates a master reset of the ADSP-217x.
T he
RESET
signal must be asserted during the power-up se-
quence to assure proper initialization.
RESET
during initial
power-up must be held long enough to allow the internal clock
SCLK
RFS
TFS
DT
DR
ADSP-217x
CLKIN
CLKOUT
V
DD
SERIAL
PORT 0
GND
SERIAL
PORT 1
DATA
ADDRESS
PMS
DMS
BMS
RD
WR
14
24
16
8
24
SERIAL DEVICE
14
2
XTAL
MMAP
BG
BR
IRQ2
RESET
SCLK
RFS or
IRQ0
TFS or
IRQ1
DT or FO
DR or FI
A
D
CS
DATA MEMORY
&
PERIPHERALS
(OPTIONAL)
A
D
CS
OE
WE
PROGRAM
MEMORY
(OPTIONAL)
NOTE:
THE TWO MSBs OF THE DATA BUS ARE USED AS THE MSBs OF THE BOOT EPROM ADDRESS.
THIS IS ONLY REQUIRED FOR THE 27C256 AND 27C512.
A
D
BOOT MEMORY
e.g., EPROM
27C64
27C128
27C256
27C512
SERIAL DEVICE
(OPTIONAL)
(OPTIONAL)
D
15-8
HOST
MODE
FL2-0
4
6
9
7
16
HOST
PROCESSOR
(OPTIONAL)
3
HIP CONTROL
HIP
HIP DATA/ADDR
PWDACK
PWD
CLOCK OR
CRYSTAL
D
23-22
D
23-8
OE
WE
OE
CS
to stabilize. If
RESET
is activated any time after power-up, the
clock continues to run and does not require stabilization time.
T he power-up sequence is defined as the total time required for
the crystal oscillator circuit to stabilize after a valid V
DD
is ap-
plied to the processor, and for the internal phase-locked loop
(PLL) to lock onto the specific crystal frequency. A minimum of
2000 CLK IN cycles ensures that the PLL has locked but does
not include the crystal oscillator start-up time. During this
power-up sequence the
RESET
signal should be held low. On
any subsequent resets, the
RESET
signal must meet the mini-
mum pulse width specification, t
RSP
.
T he
RESET
input contains some hysteresis; however, if you use
an RC circuit to generate your
RESET
signal, the use of an ex-
ternal Schmidt trigger is recommended.
T he master reset sets all internal stack pointers to the empty
stack condition, masks all interrupts and clears the MST AT reg-
ister. When
RESET
is released, if there is no pending bus re-
quest and the chip is configured for booting (MMAP = 0), the
boot-loading sequence is performed. T hen the first instruction is
fetched from internal program memory location 0x0000.
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| ADSP-2171BS-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.33MHz 33MIPS 128-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:16 BIT FXD PT PROC 33MIPS - Bulk 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT |
| ADSP-2171BST-104 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADSP-2171BST-133 | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 33.33MHz 33MIPS 128-Pin TQFP 制造商:Rochester Electronics LLC 功能描述:16BIT FXD PT PROC 33 MIPS - Bulk 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT |
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