HD6417751RBP240V Datasheet, PDF (845/1226 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

17. Smart Card Interface
(4) Power-On and Clock
The following procedure should be used to secure the clock duty cycle after powering on.
1. The initial state is port input and high impedance. Use pull-up or pull-down resistors to fix the
potential.
2. Fix at the output specified by the CKE1 bit in the serial control register (SCSCR1).
3. Set the serial mode register (SCSMR1) and smart card mode register (SCSCMR1), and switch
to smart card mode operation.
4. Set the CKE0 bit in SCSCR1 to 1 to start clock output.
Rev.4.00 Oct. 10, 2008 Page 745 of 1122
REJ09B0370-0400