MC68HC05B6_13 Datasheet, PDF (32/302 Pages) Freescale Semiconductor, Inc – Microcontrollers

2.3
‘Jump to any address’
2
The ‘jump to any address’ mode is entered when the reset pin is released to V_DD, if the following
conditions are satisfied:
– IRQ at 2xV_DD
– TCAP1 at V_DD
– PD3 at V_DD for at least 30 machine cycles after reset
– PD4 at V_DD for at least 30 machine cycles after reset
This function allows execution of programs previously loaded in RAM or EEPROM using the
methods outlined in Section 2.2.
To execute the ‘jump to any address’ function, data input at port A has to be $CC and data input at
port B and port C should represent the MSB and LSB respectively, of the address to jump to for
execution of the user program. A schematic diagram of the circuit required is shown in Figure 2-2.
Freescale
2-4
MODES OF OPERATION AND PIN DESCRIPTIONS
MC68HC05B6
Rev. 4.1