M306V0ME Mitsubishi, M306V0ME Datasheet - Page 90

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

90
Figure 2.10.15 Example of how an 8-bit pulse width modulator operates
C o u n t s o u r c e ( N o t e 1 )
T i m e r o v e r f l o w
U n d e r f l o w s i g n a l o f
8 - b i t p r e s c a l e r ( N o t e 2 )
P W M p u l s e o u t p u t
f r o m T A
T i m e r A i i n t e r r u p t
r e q u e s t b i t
i O U T
C o n d i t i o n : R e l o a d r e g i s t e r h i g h - o r d e r 8 b i t s = 0 2
p i n
f
i
: F r e q u e n c y o f c o u n t s o u r c e
( f
1
, f
R e l o a d r e g i s t e r l o w - o r d e r 8 b i t s = 0 2
T i m e r o v e r f l o w i s s e l e c t e d
“ H ”
“ L ”
“ H ”
“ L ”
“ H ”
“ L ”
“ 1 ”
“ 0 ”
8
, f
N o t e s 1 : T h e 8 - b i t p r e s c a l e r c o u n t s t h e c o u n t s o u r c e .
3 2
, f
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
C 3 2
2 : T h e 8 - b i t p u l s e w i d t h m o d u l a t o r c o u n t s t h e 8 - b i t p r e s c a l e r ' s u n d e r f l o w s i g n a l .
3 : m = 0 0
)
1 6
t o F E
1 6
C l e a r e d t o “ 0 ” w h e n i n t e r r u p t r e q u e s t i s a c c e p t e d , o r c l e a r e d b y s o f t w a r e
; n = 0 0
1 / f
i
1 6
1 / f
X ( m + 1 )
1 / f
t o F E
i
i
X ( m + 1 ) X ( 2 – 1 )
X ( m + 1 ) X n
1 6
.
1 6
1 6
8
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M306V0ME-XXXFP
M306V0EEFP
Rev. 1.0