m37280eksp Mitsumi Electronics, Corp., m37280eksp Datasheet - Page 12

• Manufacturer Part Number: m37280eksp
• Description: Single-chip 8-bit Cmos Microcomputer With Closed Caption Decoder And On-screen Display Controller
• Manufacturer: Mitsumi Electronics, Corp.

Fig. 12.1.1 CPU Mode Register
12
12. FUNCTIONAL DESCRIPTION
12.1. CENTRAL PROCESSING UNIT (CPU)
This microcomputer uses the standard 740 Family instruction set.
Refer to the table of 740 Family addressing modes and machine
instructions or the SERIES 740 <Software> User’s Manual for de-
tails on the instruction set.
Machine-resident 740 Family instructions are as follows:
The FST, SLW instruction cannot be used.
The MUL, DIV, WIT and STP instructions can be used.
x x x x
CPU Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
1
1
0
0
Note: This bit is set to “1” after the reset release.
0, 1
3, 4
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
B
2
6
7
5
CPU mode register (CM) [Address 00FB
Main Clock (X
stop bit
(CM6)
Internal system clock
selection bit
(CM7)
Processor mode bits
(CM0, CM1)
Stack page selection
bit (CM2) (See note)
X
selection bit (CM5)
Fix these bits to “1.”
COUT
drivability
M37280MF–XXXSP, M37280MK–XXXSP
Name
IN
–X
OUT
12.1.1 CPU Mode Register
The CPU mode register contains the stack page selection bit and
internal system clock selection bit. The CPU mode register is allo-
cated at address 00FB
)
b1 b0
0: X
1: X
0: 0 page
1: 1 page
0: Oscillating
1: Stopped
0 0: Single-chip mode
0 1:
1 0:
1 1:
0: LOW drive
1: HIGH drive
(high-speed mode)
(low-speed mode)
IN
CIN
–X
Functions
–X
Not available
OUT
COUT
selected
16
and ON-SCREEN DISPLAY CONTROLLER
selected
]
MITSUBISHI MICROCOMPUTERS
16
.
After reset R W
0
1
1
1
0
0
M37280EKSP
R W
R W
R W
R W
R W
R W
Rev. 1.0