ST8034C datasheet(26/39 Pages) STMICROELECTRONICS

Part #	ST8034C

Description	16-pin smartcard interfaces

PDF	39 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

26 / 39 page

DocID024587 Rev 4

27/40

ST8034T, ST8034AT, ST8034P, ST8034C

Functional description

6.6

Activation sequence

The following device activation sequence is applied when using an external clock, see also

Figure 12.

CMDVCC is pulled low (t0).

The internal oscillator is triggered (t0).

The internal oscillator changes to high frequency (t1).

VCC rises from 0 V to 3 V or to 5 V (or to 1.8 V in the case of ST8034P) on

a controlled slope (t2).

I/O is driven high (t3).

The clock on the CLK output is applied to the C3 contact (t4).

RST is enabled (t5).

Time delays



t1 = t0 + 384 × 1/fOSC(INT)LOW



t2 = t1



t3 (tD(START)) = t1 + 17T/2



t4 = driven by host microcontroller, t5 > t4 > t3



t5 (tD(END)) = t1 + 23T/2.

T = 64 x 1/fOSC(INT)

Figure 12. Activation sequence

ST8034C Datasheet(PDF) 26 Page - STMicroelectronics