m37280eksp Mitsumi Electronics, Corp., m37280eksp Datasheet - Page 121

• 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.15.4 State Transitions of System Clock
Rev. 1.0
Notes 1: When the STP state is ended, a delay of approximately 4 ms is automatically generated by timer 3 and timer 4.
The example assumes that 8 MHz is being applied to the X
32 kHz oscillating
32 kHz oscillating
32 kHz oscillating
8 MHz oscillating
is stopped (HIGH)
is stopped (HIGH)
Timer operating
Timer operating
8 MHz oscillating
is stopped (HIGH)
Timer operating
8 MHz stopped
2: The delay after the STP state ends is approximately 1 s.
3: When the internal clock
(Note 3)
(Note 3)
External INT,
timer interrupt,
or SI/O interrupt
WIT instruction
WIT instruction
WIT instruction
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
Interrupt
Interrupt
Interrupt
divided by 8 is used as the timer count source, the frequency of the count source is 2 kHz.
M37280MF–XXXSP, M37280MK–XXXSP
CM6 = 1
CM7 = 1
32 kHz oscillating
32 kHz oscillating
8 MHz oscillating
32 kHz oscillating
8 MHz oscillating
8 MHz stopped
f( ) = 4 MHz
f( ) = 16 kHz
f( ) = 16 kHz
IN
Reset
pin and 32 kHz to the X
CM6 = 0
CM7 = 0
High-speed operation start
mode
CM6 : Main clock (X
CM7 : Internal system clock selection bit
STP instruction
Interrupt (Note 1)
Interrupt (Note 2)
STP instruction
Interrupt (Note 2)
STP instruction
The program must
allow time for 8 MHz
oscillation to stabilize
External INT
CIN
and ON-SCREEN DISPLAY CONTROLLER
0 : Oscillating
1 : Stopped
0 : X
1 : X
pin. The
MITSUBISHI MICROCOMPUTERS
IN
CIN
-X
-X
OUT
COUT
indicates the internal clock.
CPU mode register
(Address : 00FB
IN
selected (high-speed mode)
–X
selected (low-speed mode)
OUT
) stop bit
is stopped (HIGH)
32 kHz stopped
8 MHz stopped
= stopped (HIGH )
is stopped (HIGH)
32 kHz stopped
32 kHz stopped
8 MHz stopped
8 MHz stopped
M37280EKSP
16
)
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