Enable target system power supply
- enables supplying of target system from programmer.
Supply voltage for target system is switched on before action with programmed device and is
switched off after action finished. If Keep ISP signals at defined level after operation is
enabled, then programmer will switch off supply voltage after pull-up/pull-down resistors are
deactivated.
Voltage
- supply voltage for target system.
Note:
The voltage value given to target system depends also on current flowing to target
system. To reach exact voltage supply for target system, the proper Voltage and Max. current
values has to be defined. The Max. current value specified has to be as exact as possible
equal to real current consumption of target system.
Max. current
- maximum current consumption of powered target system.
Voltage rise time
- determines skew rate of rising edge of target supply voltage (switch on
supply voltage).
Target supply settle time
- determines time, after which must be supply voltage in target
system stabilized at set value and target system is ready to any action with programmed
device.
Voltage fall time
- determines skew rate of falling edge of target supply voltage (switch off
supply voltage).
Power down time
- determines time after switch off target system power supply within target
system keeps residual supply voltage (e.g. from charged capacitor). After this time elapsed
target system has to be without supply voltage and can be safely disconnected from
programmer.
group
Target System Parameters
Oscillator frequency
(in Hz) - oscillator's frequency of device (in target system). Control
program sets programming speed by its, therefore is necessary set correct value.
Supply voltage
(in mV) - supply voltage in target system. Control program checks or sets (it
depends on programmer type) entered supply voltage in target system before every action on
device.
Disable test supply voltage
- disables measure and checking supply voltage of
programmed device, set in Supply voltage edit box, before action with device.
Delay after reset active
- this parameter determine delay after Reset signal active to start
action with device. This delay depends on values of used devices in reset circuit of device
and can be chosen from these values: 10ms, 50ms, 100ms, 500ms or 1s.
I
nactive level of ISP signals
- this parameter determine level of ISP signals after finishing
access to target device. Signals of ISP connector can be set to Pull-up (signals are tied
through 22k resistors to supply voltage) or Pull-down (signals are tied through 22k resistors to
ground).
Keep ISP signals at defined level after operation
- enables keeping set level of ISP signals
after access to target device finished. Control program indicates activated pull-up/pull-down
85
Summary of Contents for 844USB
Page 7: ...Introduction 7 ...
Page 12: ...Quick Start 12 ...
Page 15: ...Detailed description 15 ...
Page 16: ...859 16 ...
Page 28: ...866B 28 ...
Page 41: ...844USB 41 ...
Page 50: ...848A 50 ...
Page 56: ...Setup 56 ...
Page 67: ...Pg4uw 67 ...
Page 117: ...Pg4uwMC 117 ...
Page 127: ...Common notes 127 ...
Page 134: ...Troubleshooting and warranty 134 ...