Analog Devices ADSP-21020 manual Memory Write

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ADSP-21020

CLKIN

ADDRESS,

SELECT

tDAP

DMPAGE,
PMPAGE
	tDAWH	tDWHA
tDAWL	tWW	tDWHA
tDAWL	tWW
DMWR,		tWWR
PMWR		tWWR

tDCKWL	tWDE		tHDWH
			tDDWH
DATA
	t DWAK		tDDWR
	t DAAK	tSAK	tHAK

DMACK,

PMACK

DMRD,

PMRD

Figure 11. Memory Write

REV. C

–21–

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Contents ADSP-21020 ADSP-21020 Address Generators and Program Sequencer Interrupts Pin Name Type Function Dmpage ResetDmts ClkiinIf condition ComputeIf condition Compute DMIa, Mb = dregNotation Meaning ItalicsName Description Fixed-Point Floating-Point = MRB MRF = MRF = SAT MRF = SAT MRB MRF MRB = MRF= MRB MRF = MRF = RND MRF = RND MRB Shifter Shifter ImmediateVector Address Hex Function Fixed-PointIRQ3 IRQ2Parameter Test Conditions Min Max Unit Grade Parameter Min Max UnitTiming Requirement Reset Setup before Clkin High 29 + DT/2Clkin Period 150 Clkin Width HighHold after Clkin High Pulse Width TCK +TDTEX Clkin High to Timexp FLAG3-0OUTDelay from Clkin High FLAG3-0INSetup before Clkin High 19 + 5DT/16Clkin High to FLAG3-0OUTEnable Clkin High to FLAG3-0OUTDisableClkin High to Memory Interface Enable 25 + DT/2 Memory Interface Disable to LowTiming Requirement Hold after Clkin HighXTS Delay after Address, Select 28 + 7DT/8 Setup before Clkin High 14 + DT/4XTS Delay after Low 16 + DT/2 Switching CharacteristicXACK Delay from XRD Low + DT/2 XACK Delay from Address + 7DT/8XACK Setup before Clkin High + DT/4 XACK Hold after Clkin High Switching CharacteristicMemory Read XACK Delay from XWR Low 15 + DT/2 XACK Delay from Address, Select 27 + 7DT/8Data Setup before XWR High + DT/2 Data Disable before XWR XRD Low + 3DT/8Memory Write System Inputs Setup before TCK High TDI, TMS Setup before TCK HighPulse Width 200 160 132 120 Switching Characteristic TDO Delay from TCK LowIeee 1149.1 Test Access Port Output Enable/Disable Output disable time tDIS is the difference betweenCapacitive Loading Example Type Pins SwitchPin Ptotal = Pext + 5 V 3 Iddin typ = 0.210 + 1.15 = 1.36 WBottom View Ribbon Cable 3 0.1 inchesADSP-21020 ADSP-21020 PGA PIN Location Name Inches Millimeters Symbol MIN MAX Ordering Guide