| ??? 08/13/08 06:52 Read: times |
#157449 - 5V for pull-up resistors Responding to: ???'s previous message |
Where are connected (powered) pull-up resistors - to "switchable" 5V or to microcontroller's supply voltage?
Pull-ups are needed - to be no floated inputs on 573 and other chips . Any pin of ADC , memory and buffer must be pulled down - BUT this will increase consumption. Maybe better idea is to disconnect GND, and to pull-high all ports. HC573 and SRAM are consuming small energy in standby mode. Problem is in ADC , where from come CLK signal from ADC? regards |
| Topic | Author | Date |
| I can´t shut down the others IC, why? | 01/01/70 00:00 | |
| How high impedance | 01/01/70 00:00 | |
| 5V for pull-up resistors | 01/01/70 00:00 | |
| still not cutting power | 01/01/70 00:00 | |
16mA ? | 01/01/70 00:00 | |
| Not a valid assumption? | 01/01/70 00:00 | |
| Power coupling from active ICs to 'OFF' ICs ? | 01/01/70 00:00 |