Differences
This shows you the differences between two versions of the page.
boards:k8048 [2014/12/17 14:24] darron |
boards:k8048 [2015/03/22 21:55] |
||
---|---|---|---|
Line 1: | Line 1: | ||
- | ==== Velleman K8048 ==== | ||
- | {{ : | ||
- | The Velleman K8048 is long standing board that incorporates a serial bit-banging programmer and simple experimenter' | ||
- | |||
- | [[http:// | ||
- | |||
- | == Serial Interface == | ||
- | |||
- | The Velleman programmer board has the following serial interface | ||
- | characteristics (D-SUB-9). | ||
- | |||
- | < | ||
- | | ||
- | | ||
- | 1 2 3 4 5 | ||
- | 6 7 8 9 | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | 6:DSR | ||
- | | ||
- | | ||
- | 9:RI | ||
- | </ | ||
- | |||
- | Although the interface connects to the serial port, it doesn' | ||
- | the RS-232 serial protocol and instead I/O is performed with bit banging. | ||
- | |||
- | Data output bits are sent through the DTR line and clocked on the falling | ||
- | edge of RTS. | ||
- | |||
- | The Tx line is utilised to enable the application of the high programming | ||
- | voltage on !MCLR/VPP and not for sending data bits. | ||
- | |||
- | Data input bits are read from the CTS line using the same clock as for | ||
- | output with the data output line taken high for correct circuit operation. | ||
- | |||
- | |||
- | == Socket Cross Reference == | ||
- | |||
- | < | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | |||
- | | ||
- | | ||
- | |||
- | | ||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | </ | ||
- | |||
- | == ICSP == | ||
- | |||
- | < | ||
- | SK3 is an ICSP port, the pins are arranged as follows: | ||
- | |||
- | ICSP | ||
- | | ||
- | 5 4 3 2 1 | ||
- | |||
- | 1:VPP 12V | ||
- | 2:VDD 5V | ||
- | | ||
- | 4:PGD | ||
- | 5:PGC | ||
- | </ | ||
- | |||
- | < | ||
- | ICSP voltage levels (No chip installed, no D-SUB-9 connection) | ||
- | | ||
- | |||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | |||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | |||
- | | ||
- | |||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | </ |