High Voltage Programming the ATtiny24

To program the ATtiny24 mounted on STK505 using High Voltage Programming, follow these steps:

  1. 1.

    Turn off the STK500 power switch

  2. 2.

    Disconnect from STK500 and STK505 any hardware that does not tolerate 5V

  3. 3.

    Connect the PROGDATA on STK500 to HVSPROG on STK505, as shown in Figure 1

  4. 4.

    Connect the PROGCTRL on STK500 to the PORTA header on STK500, as shown in Figure 1

  5. 5.

    Set jumpers and switches according to Table 1

  6. 6.

    Turn on STK500 power

  7. 7.

    Start the Programming Dialog in AVR Studio

Figure 1. High Voltage programming of the ATtiny24

Table 1. High Voltage programming the ATtiny26
STK500
VTARGET Mounted
AREF Optional
RESET Mounted
XTAL1 Mounted
OSCSEL Mounted, pin 1 and 2
BSEL2 Mounted
PJUMP Open
STK505
RESET switch RESET position
XTAL switch EXT CLK position