Posted on May 17, 2011 at 12:10IOL is 10 mA at VOL = 0.6V for port 4 and is 8 mA for Port A, B, C, and D. However, the total operating current in Turbo mode is about 79 mA (5V) or 63 mA (3.3 V). Driving LED with 20 mA is too much for the MCU. han-wa...
Posted on May 17, 2011 at 12:09That is because you forget to enable UART0 receive. You neeed to add the statement SCON0 = 0x50; to your program. han-way huang
Posted on May 17, 2011 at 12:09Hello: What this means is that the high output of the uPDS pin may not be high enough for the 5-V I/O device (so won't be interpreted as logic 1) and the low output voltage from an I/O device with 5-V power supply may ...
Posted on May 17, 2011 at 12:09That is exactly what you suspected. If you looked at page 128/231 of the uPSd33xx datasheet. In 8-bit PWM mode, the PWMFm register holds the value for setting the frequency (or period) whereas the CAPCOMHn register hol...
