M306H1SFP Datasheet, PDF (21/243 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA SLICER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H1SFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA SLICER and ON-SCREEN DISPLAY CONTROLLER
2.4 Processor Mode
(1) Types of Processor Mode
Processor mode can be used at microprocessor mode.
• Microprocessor mode
In microprocessor mode, the SFR, internal RAM, and external memory space can be accessed.
In this mode, some of the pins function as the address bus, the data bus, and as control signals. The
number of pins assigned to these functions depends on the bus and register settings. (See “ 2.4.1 Bus
Settings” for details.)
(2) Setting Microprocessor Mode
Microprocessor mode is set using the CNVSS pin and the processor mode bits (bits 1 and 0 at address
000416). Set the processor mode bits to “112”.
Regardless of the level of the CNVSS pin, the processor mode bits can be changed by software. There-
fore, never change the processor mode bits when changing the contents of other bits.
• Applying VCC to CNVSS pin
The microcomputer starts to operate in microprocessor mode after being reset.
Figure 2.4.1 shows the processor mode register 0 and 1.
Figure 2.4.2 shows the memory maps applicable for microprocessor mode.
Rev. 1.0
20