Fujitsu F2MC-16LX Hardware Manual page 147

6.3 Operation of the External Memory Access Control Signals
2
The F MC-16LX installs two types of the auto ready function. The auto ready function for
external memory can expand an access cycle by inserting one to three wait cycles automatically
using no external circuit in the following cases: The external area at low-order addresses
002000 to 7FFFFF is accessed and the external area at high-order addresses 800000 to
H H H
FFFFFF is accessed. This function is activated by setting the LMR1 and LMR0 bits (low-order
H
address external area) of the ARSR and the HMR1 and HMR0 bits (high-order address external
area) of the ARSR.
2
Additionally, the F MC-16LX installs the auto ready function for external I/O independently from
the auto ready function for external memory. This function expands an access cycle by
inserting one to three wait cycles automatically with no external circuit at access to the external
area in addresses 0000C0 to 0000FF . This function is activated by setting the IOR1 and
H H
IOR0 bits of the ARSR.
For the auto ready function for external memory and for external I/O, the wait cycle continues as
is if the RYE bit of the EPCR is set to "1" and the low level is input to the P36/RDY pin after the
wait cycle applied by the auto ready function terminates.
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