IXXBB1 Fujitsu Microelectronics, Inc., IXXBB1 Datasheet - Page 24

Manufacturer Part Number

IXXBB1

Description

32-bit Proprietary Microcontroller Cmos Fr60 Mb91301 Series

Manufacturer

Fujitsu Microelectronics, Inc.

Datasheet

1.IXXBB1.pdf (135 pages)

MB91301 Series

Clock control block

Bit search module

I/O port access

Shared port function switching

D-bus memory

Notes on during operation of PLL clock mode

If the PLL clock mode is selected, the microcontroller attempt to be working with the self-oscillating circuit even

when there is no external oscillator or external clock input is stopped. Performance of this operation, however,

cannot be guaranteed.

For L-level input to the INIT pin, allow for the regulator settling time or oscillation settling time.

The 0-detection, 1-detection, and transition-detection data registers (BSD0, BSD1, and BSDC) are only word-

accessible.

Byte access only for access to port

To switch a pin that also serves as a port, use the port function register (PFR). Note, however, that bus pins are

switched depending on external bus settings.

Do not set a code area in D-bus memory.

No instruction fetch is performed to the D-bus.

Instruction fetches to the D-bus area result in incorrect data interpreted as code, which can cause the micro-

controller to lose control.

Do not set a data area in I-bus memory.

Note: Stop mode (oscillation stop mode) can not be used.

Using an external clock (12.5 MHz Max)

Using an external clock (normal)

OPEN

MB91301 series