Rainbow Electronics AT89C5122 - Manual (Page 91)

91
AT8xC5122/23
4202E–SCR–06/06
Figure 47. Card Vcc = 3V Initialization Procedure
Mode Regulation
DCCKPS[7]=1
VCARDOK=1
Set Timeout to 3 ms
Timeout
Expired
DC/DC Initialization
Failure
DC/DC Initialization
successful
BOOST[1:0]=01
SCICR.7=Reset=0
SCICR.7=Reset=1
SCCON CardVcc=1
VCARD[1:0] = 10