Specifications

Memory Map
13-7 ’24x–’240x Family Compatibility
13.3.3 I/O Space
The ’LF2407 is the only device which has all the I/O space enabled and is avail-
able through the external memory interface. All ’240x devices have two ad-
dresses in the I/O space as internal registers for Flash and wait-state genera-
tor. Table 13–4 explains the internal register addresses that are used. The ex-
ternal I/O space is reserved for all ’240x devices except the ’LF2407.
Table 13–4. I/O Mapped Registers
Name I/O Address Availability Description
FCMR FF0Fh All ’240x devices
Dummy I/O address space reserved for enabling/
disabling Flash control registers
WSGR FFFFh ’LF2407 only
Software wait-state generator for the external
memory address in Program, Data, and I/O