Labels:text | diagram | screenshot | font | parallel OCR: REAL-TIME CLOCK/1 LENDAR BOARD 03 JUMPER U₁ If you will be writing custom software for the clock, there are several things to keep in mind: 1. In order to use the +/- 30 second adjustment, or test features, jumpers A-A and/ox B-B must be installed. 2. This clock chip is capable of generating interrups at different rates. To use this feature, you must connect CA1 to one of the clock data lines. Interrupt frequencies, with proper software, are as follows: Output Frequency Pulse width DO 1024 Hz 50% duty D1 1 Hz 122.1 us TO AMIGA +5V 122.1 us D2 D3 1/60 Hz 1/3600 Hz 122.1 us PARTS LIST PCB3 CLOCK/CALENDAR PRINTED CIRCUIT U1 OKI MSM5832 REAL-TIME CLOCK/CALENDAR X1 32.768 KHZ CRYSTAL 01 4.7UF 6.3V CAPACITOR C2 20PF DISK CAPACITOR C3 5-35PF VARIABLE CAPACITOR R1 2.7K 1/4W RESISTOR R2 10021/4W RE ...
(.png)
