Programmable Device Codes


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Programmable Device Codes, Page 3
Last Updated on: Friday, August 29, 2008 02:33 PM

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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Programmable Timer for Appliances: (added 11/05)

Programmer for the 68HC705C8 MicroController: (added 4/08)

Programmer PIC16F84,12C50x and EEPROM 24Cxx #2: (added 11/05)

Programmer PIC16F84,12C50x and EEPROM 24Cxx: (added 11/05)

Sequential Channel selector simplifies software: 01/04/01 EDN-Design Ideas / (added 11/05) -- An efficient but powerful circuit is useful for a variety of applications with limited I/O and for which you want to use one input to sequentially select a different output channel ( Figure 1 ). When the software changes the state of only one input,...

Software avoids interrupt overhead: 03/02/00 EDN-Design Ideas / (added 11/05)

Software configures IBM PC interrupts: 11/10/94 EDN Design Ideas / (added 11/05)

Software implements digital potentiometer: 06/08/95 EDN-Design Ideas / (added 11/05)

Software makes full use of 8051's interrupt system: 12/06/01 EDN Design Ideas / (added 11/05) The program in Listing 1 uses a pseudo-RETI instruction to provide a five-priority-level interrupt system for the 8051P microcontroller. The interrupt-priority order, from high to low, is INT0 IT0 INT1 IT1 INTP. Before the pseudo-RETI instruction arrives in the IT0 or IT1 interrupt-service routine, the address of the first instruction, which is after the pseudo-RETI instruction, goes ba... ...

Software PLL locks VCXO to reference : 08/03/98 EDN-Design Ideas / (added 2/06)

Software provides three-priority-level interrupt for 8051: 09/14/00 EDN-Design Ideas / (added 11/05)

Software reset uses I²C I/O port: 05/16/02 EDN Design Ideas / (added 11/05) You can use the circuit in Figure 1 to allow the I2C or SMBus to control device resets in a system by using the PCA9554 I2 C I/O-port IC. Normally, a reset function takes an active-low signal. On power-up of the PCA9554, the IC sets all the I/O pins as inputs. The 4.7-kΩ pull-down resistor on each I/O ensures that all the active-low reset pins are initially in a low state during power-up....

Software routine minimizes large logic tables: 07/03/97 EDN-Design Ideas / (added 11/05)

Software routine stabilizes hardware register : 07/18/96 EDN-Design Ideas / (added 11/05)

Software snippet provides improved subset sum algorithm : 09/25/03 EDN-Design Ideas / (added 11/05) The subset-sum problem is one of the most frequently occurring NP (nondeterministic, polynomial-time)-complete) problems. It asks whether a subset of numbers in a set of positive integers adds up exactly to a given value. A relaxed version of the problem tries to identify a subset of numbers that adds up to a maximum value no greater than a given value....

Software speeds 8051 RS-232C receiver : 12/04/97 EDN-Design Ideas / (added 11/05)

USB to RS-232 Dongle: (Circuit / schematic design added 6/06)

Voltage Reference is software Programmable: 08/18/05 EDN Design Ideas / (added 11/05) Obtain extra reference voltages from existing ones.