Motorola MCU 68HC912D60 Manual de usuario

MOTOROLASEMICONDUCTOR TECHNICAL INFORMATION68HC912D60MSE4 Rev 2March 14, 2001When contacting a Motorola representative for assistance, please have the

10 68HC912D60MSE4 Rev 2 March 14, 2001in LHM since no crystal oscillations will be detected. This situation can arise with short reset periods and/or

68HC912D60MSE4 Rev 2 11 March 14, 2001Lastly, an alternative and simpler approach is to just hold reset low for a substantial time (> 100 milliseco

12 68HC912D60MSE4 Rev 2 March 14, 2001Figure 2. Representation of unreliable start-up mode with slow crystalFigure 3. Representation of preferred mean

68HC912D60MSE4Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or

2 68HC912D60MSE4 Rev 2 March 14, 2001ATD: CONVERSION OF THE (VRH-VRL)/2 INTERNAL REF VOLTAGE RETURNS $7F, $80 OR $81 AR311The (VRH-VRL)/2 internal ref

68HC912D60MSE4 Rev 2 3 March 14, 2001BDM AR572When the BDM module is using synchronized XTAL/2 (CLKSW=0) as its reference clock and the PLL is providi

4 68HC912D60MSE4 Rev 2 March 14, 2001CGM: CRYSTAL START-UP WITHOUT DELAY AT CLOCK MONITOR RESETAR509When a clock monitor reset occurs, the crystal may

68HC912D60MSE4 Rev 2 5 March 14, 2001BRCLRRTIFLG,#RTIF,RTIFClr; RTIF flag is already clearLDAB#RTIF; if it’s set, clear the flag.STABRTIFLGRTIFClr:BRC

6 68HC912D60MSE4 Rev 2 March 14, 2001CGM: STOP DOES NOT TAKE TIME-OUT WHEN RESET CAUSES THE RELEASE AR431When coming out of STOP by using reset, the c

68HC912D60MSE4 Rev 2 7 March 14, 2001INT: EDGE SENSITIVE IRQ DOES NOT WORK CORRECTLY DURING STOPAR528When using an edge sensitive IRQ signal to trigge

8 68HC912D60MSE4 Rev 2 March 14, 2001IOB: AR510Expanded mode operation causes an increase in bus driver shoot through current pin leakage which can ca

68HC912D60MSE4 Rev 2 9 March 14, 2001GPIO: FUNCTION CANNOT BE RE-ENABLED ON TX PIN IMMEDIATELYAR571The Tx pin cannot be changed to GPIO immediately. T