M3882 Datasheet, PDF (10/62 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3882 Group
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit, etc.
The CPU mode register is allocated at address 003B16.
b7
0 01
b0
CPU mode register
(CPUM : address 003B16)
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 : Not available
1 0 : Not available
1 1 : Not available
Stack page selection bit
0 : 0 page
1 : 1 page
Fix this bit to “1”.
Fix this bit to “0”.
Main clock division ratio selection bits
b7 b6
0 0 : φ = f(XIN)/2 (high-speed mode)
0 1 : φ = f(XIN)/8 (middle-speed mode)
1 0 : Not available
1 1 : Not available
Fig. 7 Structure of CPU mode register
Rev.1.01 Nov 14, 2005 page 10 of 60
REJ03B0089-0101