m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 207

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

3. APPENDIX
Fig. 3.3.25 Structure of CPU mode register
Fig. 3.3.26 Structure of Interrupt request register 1
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
CPU mode register
b7 b6 b5 b4 b3 b2 b1 b0
B
0
1
2
3
4
5
6
7
Interrupt request reigster 1 (IREQ1) [Address:3C
4
B
0
1
2
3
5
6
7
CPU mode register (CPUM) [Address:3B
INT
INT
Serial I/O 2 interrupt request
Serial I/O 3 interrupt request
Timer 1 interrupt request bit
Timer 2 interrupt request bit
"0" is set by software, but not "1."
Processor mode bits
Stack page selection bit
X
Port Xc switch bit
Main clock (X
Main clock division ratio
selection bit
Internal system clock selection
bit
bit
bit
INT
Remote control/counter
overflow interrupt request bit
Serial I/O 1 interrupt request
Serial I/O automatic transfer
interrupt request bit
COUT
bit
0
1
/ZCR interrupt request bit
2
interrupt request bit
interrupt request bit
drivability selection bit
Name
Name
3819 Group USER’S MANUAL
IN
-X
OUT
) stop bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
b1b0
0 0 : Single-chip mode
0 1 :
1 0 :
1 1 :
0 : 0 page
1 : 1 page
0 : Low
1 : High
0 : I/O port function
1 : X
0 : Operating
1 : Stopped
0 : f(X
1 : f(X
0 : X
1 : X
(middle/high-speed mode)
(low-speed mode)
CIN
IN
CIN
IN
IN
-X
16
–X
-X
)/2 (high-speed mode)
)/8 (middle-speed mode)
]
OUT
Function
COUT
Function
COUT
Not available
selected
3.3 Control registers
16
selected
oscillating function
]
MITS
UBISHI MICROCOMPUTER
3819 Group
At reset
At reset
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
R W
R W
193