Specifications

Program Memory
3-11 Memory
- MP/MC pin. The level on the MP/MC pin determines whether program
instructions are read from on-chip flash/ROM or external memory:
J MP/MC = 0. The device is configured in microcontroller mode. The on-
chip ROM/flash EEPROM is accessible. The device fetches the reset
vector from on-chip memory. Accesses to program memory
addresses 0000h–7FFFh will be made to on-chip memory in the case
of ’2407.
J MP/MC = 1. The device is configured in microprocessor mode. The
device fetches the reset vector from external memory. Accesses to
program memory addresses 0000h–7FFFh will be made to off-chip
memory.
Regardless of the value of MP/MC, the ’240x fetches its reset vector at
location 0000h in program memory. Note that there is no MP/MC pin avail-
able on devices that lack an external memory interface.