Hi, everyone. I'm controlling H-Bridges with RS232 signals. Until now, I've been using a microcontroller to perform this task, but I think it's possible to bypass the microcontroller entirely. Doing so would be very cool.
Anyway, I've been looking at the HD-6402 as a possible replacement for the uC. It takes in a byte of serial data, and then sets 8 discrete, parallel, digital signals (RBR1-RBR8, one for each bit). All without software!
Each of these signals could control a pair of transistors for a total of up to 4 H-Bridges, but I have some questions first:
1) The 6402's RRC pin needs to be attached to an external clock running at 16x the data rate. Can anyone refer me to such a clock, assuming I'm using 9600 baud? Do they make RS232 interfaces with internal clocks? (I wouldn't mind having a fixed data rate.)
2) I need to pulse the 6402's master reset (MR) signal, but only once when the device starts up. Is there a good way to do this automatically when I connect my power source? BTW, I could add a pushbutton to get around this problem temporarily. Not really a critical item.
3) I don't want all of those transmission and control pins floating around. And I don't want to have to tie half of the device to the rails. I would be much happier with just the receiver half of the component. Can anyone point me to such a device?
That's all for now. Thanks for reading! I look forward to your suggestions, comments, criticism, fan mail, love letters, etc...
Anyway, I've been looking at the HD-6402 as a possible replacement for the uC. It takes in a byte of serial data, and then sets 8 discrete, parallel, digital signals (RBR1-RBR8, one for each bit). All without software!
Each of these signals could control a pair of transistors for a total of up to 4 H-Bridges, but I have some questions first:
1) The 6402's RRC pin needs to be attached to an external clock running at 16x the data rate. Can anyone refer me to such a clock, assuming I'm using 9600 baud? Do they make RS232 interfaces with internal clocks? (I wouldn't mind having a fixed data rate.)
2) I need to pulse the 6402's master reset (MR) signal, but only once when the device starts up. Is there a good way to do this automatically when I connect my power source? BTW, I could add a pushbutton to get around this problem temporarily. Not really a critical item.
3) I don't want all of those transmission and control pins floating around. And I don't want to have to tie half of the device to the rails. I would be much happier with just the receiver half of the component. Can anyone point me to such a device?
That's all for now. Thanks for reading! I look forward to your suggestions, comments, criticism, fan mail, love letters, etc...