Micropower |
Volume 2, Number 4 – September 1982 |
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Page 28 of 36 |
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Your board is now a 2732 programmer when switch 2 is pushed in and a 2716 programmer when switch 2 is out, but only when the software is correct.
Thank you Bits and PCs for your fully documented listing. I am most grateful. First, the functions of the bits 0 to 6 of the control word that is used to control the EPROM blower.
Bit | Function | Name | |
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0 | 0 volts | Increments address counter clock | ACLOCK |
0 | 5 volts | No increment | |
1 | 0 volts | Enables address counter clock | RESET |
1 | 5 volts | Resets address counter clock | |
2 | 0 volts | 2732 programming pulse of 0v | RP2732 |
2 | 5 volts | 2732 standby, 5v on/CE | |
3 | 0 volts | Enables donor ROM /OE | MROM |
3 | 5 volts | Disables donor ROM | |
4 | 0 volts | Disables 2716 5v programming pulse | TRIG |
4 | 5 volts | Triggers 2716 5v programming pulse | |
5 | 0 volts | Enables 2716 receptor ROM /OE | RW2716 |
5 | 5 volts | Disables 2716 output from /OE | |
6 | 0 volts | Read enable 2732, 0v to /OE Vpp | V2STRG |
6 | 5 volts | 25 volts to 2732, 25v to /0E Vpp |
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Page 28 of 36 |
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