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PIC 16F628.The 16F628 is
a
low cost replacement
for the 16F84... Sponsored Links...
The 16F84 has 1 peripheral (Timer 0) whereas the PIC16F628 has three timers, a USART, a CCP (for Pulse Width Modulation, capture and compare), and an analogue comparator. One other useful feature is that you can switch it from internal 4MHz to slow speed internal 37kHz on the fly so you can used it in power sensitive applications. The two most important features are that there is 2k of program memory and 224 Bytes of RAM. This last one is nearly four times as much as the 16F84 and for high level language use this makes it much easier to use as it is the resource the you run out of most quickly. Jump to PIC16F628 bubble diagram. Jump to bubble diagram device list. For a summary of each peripheral block click here. Note: To compare bubble diagrams open each device page in a separate window (a tabbed browser is useful for this) and hit the 'Jump to device' link above then alternately select each view to see the differences between the devices. 16F628The 16F628 pic microcontroller is quite a capable little device having enough memory for useful applications and the only features it lacks are an ADC and I2C capability. You can get round the lack I2C by hand programming it (see this project for source code) and you could use an external ADC. A better choice may be the 16F88 that has a built in 10 bit ADC Note: The 16F88 does not do master mode I2C (only has interrupts for start and stop bits) you still have to do master mode I2C by coding. Jump from 16f628 resources to Best Microcontroller Projects Home Page.
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