Fujitsu F2MC-16LX Hardware Manual page 203

[bit 11] HMBS
Specify the bus size when accessing the external bus to the area 800000
bus 16-bit mode.
0
1
[bit 10] WRE
Control the output of the external write signal (WRH/WRL) pins in the external data bus 16-bit mode, and
(WRL) pin in the external data bus 8-bit mode).
0
1
[bit 9] LMBS
Specify the bus size when accessing the external bus to the area 007100
extended I/O area 007900
0
1
Note:
In the external data bus 16-bit mode, when you permit the WRH/WRL) function by the WRE bit, be
sure to place P53/P52 in the input mode (set the bit 3 and 2 of DDR5 to "0").
In addition, the I/O function of the port is enabled even when the RDY and HRQ inputs by RYE and
HDE bits are permitted. Therefore, be sure to set to "0" (input mode) for the bit corresponding to the
port in DDR5.
Bus size access of 16 bits (Initial Value in the external vector mode 1)
Bus size access of 8 bits (Initial Value in the external vector mode 0.2)
I/O Port (P53, P52) operation (Write signal output permission)
Write strobe signal (WRH/WRL or WRL only) output permission. [Initial value]
to 007FFF is disable) in the external data bus 16-bit mode.
H H
16-bit bus size access [Initial value]
8-bit bus size access
CHAPTER 7 MODE SETTING
to FFFFFF in the external data
H H
to 7FFFFF (however, the
H H
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