Mode Pins (Md2 To Md0) - Fujitsu F2MC-16LX Hardware Manual

7.2

Mode Pins (MD2 to MD0)

The mode pin is the three external pins (MD2 to MD0) and specifies the load methods
for the reset vector and the mode data.
Setting of Mode Pins (MD2 to MD0)
With the mode pin (MD2 to MD0), you may select either the external data bus or the internal data bus for
the reset vector read and select the bus width while selecting the external data bus. For the internal Flash
ROM products, the mode pin also specifies the Flash ROM write mode to write the internal ROM program
and so forth.
Table 7.2-1 shows the content of the mode pin setting.
Table 7.2-1 Content of Setting of Mode Pins
P61 P60 MD2 MD1 MD0
- - 0 0
- - 0 0
- - 0 1
- - 0 1
- - 1 0
- - 1 0
1 0 1 1
- - 1 1
Note:
Set MD2 to MD0:0=V
initial value of 8-bit. When setting 16-bit as the data bus width, specify the mode data for the non-
multiplex external data bus 16-bit mode, and then the LMBS areas are set to the 16-bit size access.
To set the HMBS area for the 16-bit size access change the HMBS setting.
Mode Name
0 External vector mode 0
1 External vector mode 1
0 External vector mode 2
1 External vector mode
0
1
0
1 Flash writer write mode
or 1=V . For the external vector mode 2, the data bus width also has the
SS CC
Reset vectors External Data
access area Bus width
External Multiplex mode
External Multiplex mode
Non-multiplex
External
mode
Internal Mode Data
Setting disabled
Flash serial writing
- -
CHAPTER 7 MODE SETTING
Remark
Reset vector
bus width access
Reset vector
bus width access
Reset vector
bus width access
Operation after reset
sequence is controlled with
mode data
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