beautypg.com

Figure 30: i, C card activation flowchart – Maxim Integrated 73S12xxF User Manual

Page 31

background image

UG_12xxF_018

Using Synchronous Smart Cards with the 73S12xxF

Rev. 1.0

31

END

A

Turn on VCC and configure

VCC stability checking for

READY START or VCC timer

by setting or clearing the

RDYST and VCCSEL[0:1] bits

in VccCtl, set SCIE for

VTMREN (if used)

Wait for smart card Interrupt

There are two methods to determine when
VCC is stable. READY START uses the
hardware to determine when VCC is stable.
The VCC timer is used to wait for a time and
then continue with activation if RDY is set
when the timer expires.

Wait for VCC to stabilize.

VCCOK bit set

in VccCtl?

VCC stable

VCC not

stable

Read SCInt

VCC stable is RDY =1 with or without VCCTimer
expiration (depending on method selected).

Figure 30: I

2

C Card Activation Flowchart

See also other documents in the category Maxim Integrated Hardware: