Intel mcs-48 manual Characteristics-Port, Characteristics-Dma, Waveforms-Dma

Models: mcs-48

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8041 AJ8641AJ8741 A

A.C. CHARACTERISTICS-PORT 2

TA=O·Cto 70·C,8041A: vcc= +5V : 10%, 8741A: Vcc= +5V :5%

Symbol

P.arameter

Min.

Max.

Unit

Telt Condition.

tcp

Port Control Setup Before Failing

110

 

 

 

 

Edge of PROG

 

ns

 

tpc

Port Control Hold After Falling

 

 

 

 

 

Edge of PROG

100

 

ns

 

tPR

PROG to Time P2 Input Must Be Valid

 

810

ns

 

tpF

Input Data Hold Time

0

150

ns

 

top

Output Data Setup Time

250

 

ns

 

tpo

Output Data Hold Time

65

 

ns

 

tpp

PROG Pulse Width

1200

 

ns

 

PORT 2 TIMING

SYNC

EXPANDER

PORT

PORT 20-3DATA

EXPANDER

PORT

INPUT

PORT 20-3DATA

PROG

A.C. CHARACTERISTICS-DMA

Symbol

Parameter

tACC

DACK to WR or"RD

tCAC

~orWAto~

tAco

DACK to Data Valid

tCRO

RD or WR to ORO Cleared

WAVEFORMS-DMA

Min. Max. Unit Test Conditions

0ns

0ns

225 ns CL = 150 pF

200 ns

IIIi

DATA BUS

ORa

- 'ACC. : -- iCAC -

.1,...----,.

)I( VALID

~I- -

Ii

l

- tAce - -ICAe - , ..--- , .

-VALID

_ . CRJ -

9-129

Da,88A

Page 444
Image 444
Intel mcs-48 manual Characteristics-Port, Characteristics-Dma, Waveforms-Dma