M306V0ME Mitsubishi, M306V0ME Datasheet - Page 37

• Manufacturer Part Number: M306V0ME
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Rev. 1.0
Figure 2.5.2 Examples of sub-clock
Figure 2.5.3 OSD clock connection example
Figure 2.5.1 Examples of main clock
2.5.2 OSD Oscillation Circuit
2.5.1 Example of Oscillator Circuit
The OSD clock oscillation circuit can obtain simply a clock for OSD by connecting an LC oscillator or a
ceramic resonator (or a quartz-crystal oscillator) across the pins OSC1 and OSC2. Which of LC oscillator
or a ceramic resonator (or a quartz-crystal oscillator) is selected by setting bits 1 and 2 of the clock control
register (address 0205
Figure 2.5.1 shows some examples of the main clock circuit, one using an oscillator connected to the
circuit, and the other one using an externally derived clock for input. Figure 2.5.2 shows some examples
of sub-clock circuits, one using an oscillator connected to the circuit, and the other one using an externally
derived clock for input. Circuit constants in Figures 2.5.1 and 2.5.2 vary with each oscillator used. Use
the values recommended by the manufacturer of your oscillator.
N o t e : I n s e r t a d a m p i n g r e s i s t o r i f r e q u i r e d . T h e r e s i s t a n c e w i l l v a r y d e p e n d i n g o n t h e o s c i l l a t o r a n d t h e o s c i l l a t i o n d r i v e
N o t e : I n s e r t a d a m p i n g r e s i s t o r i f r e q u i r e d . T h e r e s i s t a n c e w i l l v a r y d e p e n d i n g o n t h e o s c i l l a t o r a n d t h e o s c i l l a t i o n d r i v e
X
X
( B u i l t - i n f e e d b a c k r e s i s t o r )
( B u i l t - i n f e e d b a c k r e s i s t o r )
I N
C I N
c a p a c i t y s e t t i n g . U s e t h e v a l u e r e c o m m e n d e d b y t h e m a k e r o f t h e o s c i l l a t o r .
W h e n t h e o s c i l l a t i o n d r i v e c a p a c i t y i s s e t t o l o w , c h e c k t h a t o s c i l l a t i o n i s s t a b l e . W h e n b e i n g s p e c i f i e d t o c o n n e c t a
f e e d b a c k r e s i s t o r e x t e r n a l l y b y t h e m a n u f a c t u r e , c o n n e c t a f e e d b a c k r e s i s t o r b e t w e e n p i n s X
M i c r o c o m p u t e r
M i c r o c o m p u t e r
c a p a c i t y s e t t i n g . U s e t h e v a l u e r e c o m m e n d e d b y t h e m a k e r o f t h e o s c i l l a t o r .
W h e n t h e o s c i l l a t i o n d r i v e c a p a c i t y i s s e t t o l o w , c h e c k t h a t o s c i l l a t i o n i s s t a b l e . W h e n b e i n g s p e c i f i e d t o c o n n e c t a
f e e d b a c k r e s i s t o r e x t e r n a l l y b y t h e m a n u f a c t u r e , c o n n e c t a f e e d b a c k r e s i s t o r b e t w e e n p i n s X
C
C
I N
C I N
16
).
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
X
C O U T
X
O U T
( N o t e )
R
C
( N o t e )
R
C
C d
C O U T
d
O U T
C1
OSC1
Microcomputer
L
OSC2
C2
V c c
V s s
V c c
V s s
( B u i l t - i n f e e d b a c k r e s i s t o r )
E x t e r n a l l y d e r i v e d c l o c k
E x t e r n a l l y d e r i v e d c l o c k
X
( B u i l t - i n f e e d b a c k r e s i s t o r )
X
C I N
and ON-SCREEN DISPLAY CONTROLLER
I N
M i c r o c o m p u t e r
M i c r o c o m p u t e r
MITSUBISHI MICROCOMPUTERS
C IN
I N
a n d X
M306V0ME-XXXFP
a n d X
X
O p e n
C O U T
X
C OU T
O p e n
O U T
O U T
.
.
M306V0EEFP
37