At83c26, Interrupts – Rainbow Electronics AT83C26 User Manual

Page 30

7511B–SCR–10/05

AT83C26

Figure 20. Transparent Mode Description

Full transparent mode on SCn interfaces (n= 3, 4, 5)

The transparent mode with A2/CK is also available for SC3, SC4 and SC5 interfaces without
CC4 and CC8.

Figure 21. Transparent Mode Description

Interrupts

The INT output is High by default. INT is driven Low by at least one of the following event:

–

INSERT1 or INSERT2 bits set (card insertion/extraction or bit set by software)

–

VCARD_INTn (n=1,2,3,4,5) bits set (the DC/DC A or LDO2 to LDO5 output voltage
has settled)

–

VDCB_INT bit set (the DC/DC B output voltage has settled)

–

over-current detection on CVCC1

–

VCARDERRn bit set (out of range voltage on CVCCn or bit set by software)
(n=1,2,3,4,5)

–

ATRERRn bit set (no ATR before the card clock counter overflows or bit set by
software) (n=1,2,3,4,5)

CCLKn

CRSTn

CIOn

I/O1

A2/CK

SMART CARD

CCLK

CC4

Micro controller

CC8

CIO

AUX1

AUX2

CC4n

CC8n

AT83C26

A1/RST

CRST