As far as this 68hc11 brief profile says
The 68HC11E family MCUs all combine the M68HC11 CPU with high-performance, on-chip peripherals. The E series is comprised of many devices with various configurations of RAM, ROM or EPROM, and EEPROM. Several low-voltage devices are also available. With the exception of a few minor differences, the operation of all E-series MCUs is identical. A fully static design and high-density complementary metal-oxide semiconductor (HCMOS) fabrication process allow E-series devices to operate at frequencies from 3 MHz to dc.
My question is the following:
given a designed board with external crystal running @ 8Mhz and MC68HC11E1CFNE2 working with Eclock @ E 2Mhz,
whenever I have to switch MCU on the socket for this board with a different MC68HC11E1CFNE3 (note the very last number),
is it guaranteed that external crystal running @ 8Mhz does good for a Eclock @ E 2Mhz and so there is not any impact on software application?