m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 30

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 2.1.5 Structure of processor mode register 1
Processor mode register 1
X : It may be either “0” or “1.”
Notes 1: After reset, this bit is allowed to be changed only once. (During the software execution, be sure not to change this bit’s
6 to 2
Bit
0
1
7
2: To reprogram the internal flash memory by using the CPU reprogramming mode, clear this bit to “0.” (Refer to section
content.)
“19.2 Flash memory CPU reprogramming mode.”)
This bit may be either “0” or “1.”
Direct page register switch bit
Fix these bits to “00000.”
Internal ROM bus cycle select bit
(Note 2)
Bit name
(Address 5F
CENTRAL PROCESSING UNIT (CPU)
7905 Group User’s Manual Rev.1.0
16
)
0 : Only DPR0 is used.
1 : DPR0 through DPR3 are used.
0 : 3
1 : 2
Function
2.1 Central processing unit (CPU)
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0
At reset
1
0
0
0
(Note 1)
R/W
RW
RW
RW
RW
X
2-7