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This parameter is intended to be used as a way of telling if the power on STK600 has
been lost or turned off and then back again.
This way, the host software can tell if the programmer needs to be initialized again
before continuing with its operation.
If the returned value is 0 the CMD_SET_CONTROL_STACK must be executed
before continuing with any high voltage programming commands.
11.8 PARAM_DISCHARGEDELAY
This parameter sets a time period for which the reset line has a higher resistance for
each time it is toggled.
The purpose is to reduce the maximum current caused by the discharge/recharge of
a decoupling capacitor connected to the reset pin.
When the reset is toggled a resistor of 510ohm will be switched in, which reduces the
peak current to an acceptable level for the internal components of the STK600.
The delay should be set to: t>510ohm*C
If no capacitor is connected this parameter could be set to 0.
11.9 PARAM2_AREF0
The parameter value is voltage in volts x100, i.e. a parameter value of 449 (decimal)
corresponds to 4.49V.
The maximum value is 5.5V, or parameter value 550.
11.10 PARAM2_AREF1
Same as for AREF0.
11.11 PARAM2_CLOCK_CONF
This is a two-byte value, which configures the chip oscillator.
Table 11-3. Two-byte value.
D15
OCT3
D14
OCT2
D13
OCT1
D12
OCT0
D11
DAC9
D10
DAC8
D9
DAC7
D8
DAC6
Table 11-4. Two-byte value.
D7
DAC5
D6
DAC4
D5
DAC3
D4
DAC2
D3
DAC1
D2
DAC0
D1
X
D0
X
The frequency is given by the formula:
Equation 11-1. Frequency
2 ?
f = 2 OCT ?
2078
DAC
1024
42
AVR079
8133A-AVR-04/08
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