Mode Setting - Fujitsu F2MC-16LX Hardware Manual

Mb90470 series 16-bit microcontroller
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CHAPTER 7 MODE SETTING
7.1

Mode Setting

2
The F
MC-16LX has different modes in each access system and access area. Each
mode is set according to a mode pin at the reset state and according to mode data
obtained by mode-fetch.
I Mode setting
2
The F
MC-16LX has different modes in each access system and access area. In this module,
they are categorized as shown in Figure 7.1-1 "Categories of modes".
Operation modes
RUN operation
FLASH write mode
I Operation modes
Operation modes are used to control the operating conditions of devices, and they are set by
mode setting pins (MDx) and with the contents of the Mx bits in mode data. By selecting an
operation mode, normal operation activation or flash serial programming can be performed.
I Bus modes
Bus modes are used to control the operation of internal ROMs and of external access functions,
and they are specified by mode setting pins (MDx) and with the contents of the Mx bits in mode
data. Mode setting pins (MDx) specify the reset vector as well as set the bus mode for reading
mode data. The Mx bits in mode data specify the bus mode during normal operation.
I Access modes
Access modes are used to control the external data bus width, and they are set by mode setting
pins (MDx) and with the contents of the Mx bits in mode data. Selection of an access mode
specifies either an 8-bit length or 16-bit length for the external data bus. It also specifies either
the non-multiplex mode or multiplex mode for the address data bus.
158
Figure 7.1-1 Categories of modes
Bus modes
Single-chip mode
Internal ROM external bus mode
External ROM external bus mode
Access modes
External bus data length
8/15 bit
Address data bus
Non-multiplex bus mode
Multiplex mode

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