MC33560DTB View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

MC33560DTB

Power Management and Interface IC for Smartcard Readers and Couplers

ON Semiconductor 

MC33560

MCU deactivates PWRON

after card extraction

CS = L, PWRON = H

CRDVCC undervoltage

−> RDYMOD = L

card inserted

poll with PWRON = L −>

RDYMOD = H: card still present

overload time

smaller than tdres

(glitch not to scale)

CRDVCC

CRDDET

INT

CS

RDYMOD

PWRON

tfltin

VTxH

VTxL

tdrdy

tdres

tdres

35 ns typ

tfltout

card extraction

poll with PWRON = L −> RDYMOD = H:

card present

MCU polls

RDYMOD = H

poll with PWRON = H −> RDYMOD = L:

DC−DC converter overload

overload time

greater than tdres −>

converter stop and

CRDVCC pulldown

Figure 28. Card Signal Sequence During VCC Overload and Unexpected Card Extraction

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