M38039G4H-XXXHP RENESAS [Renesas Technology Corp], M38039G4H-XXXHP Datasheet - Page 13
M38039G4H-XXXHP
Manufacturer Part Number
M38039G4H-XXXHP
Description
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M38039G4H-XXXHP.pdf
(92 pages)
- Current page: 13 of 92
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3803 Group (Spec.H QzROM version)
Rev.1.10
REJ03B0166-0110
[CPU Mode Register (CPUM)] 003B
The CPU mode register contains the stack page selection bit, the
internal system clock control bits, etc.
The CPU mode register is allocated at address 003B
Fig 8.
Structure of CPU mode register
Nov 14, 2005
b7
Page 13 of 91
16
1
16
.
b0
CPU mode register
(CPUM: address 003B
Processor mode bits
Stack page selection bit
Fix this bit to “1”.
Port X
Main clock (X
Main clock division ratio selection bits
b1 b0
b7 b6
0
0
1
1
0
0
1
1
0 : 0 page
1 : 1 page
0 : I/O port function (stop oscillating)
1 : X
0 : Oscillating
1 : Stopped
0 : Single-chip mode
1 :
0 :
1 :
0 : φ = f(X
1 : φ = f(X
0 : φ = f(X
1 : Not available
C
switch bit
CIN
-X
IN
COUT
Not available
-X
IN
IN
CIN
OUT
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
)/2 (high-speed mode)
)/8 (middle-speed mode)
oscillating function
)/2 (low-speed mode)
) stop bit
16
)
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