M306V2 Mitsubishi, M306V2 Datasheet - Page 93

• Manufacturer Part Number: M306V2
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Rev. 1.0
Figure 2.10.21 Timer Bi mode register in timer mode (i = 0 to 2)
Table 2.10.5 Timer specifications in timer mode
(1) Timer mode
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TBi
Read from timer
Write to timer
In this mode, the timer counts an internally generated count source. (See Table 2.10.5) Figure 2.10.21
shows the timer Bi mode register in timer mode.
T i m e r B i m o d e r e g i s t e r
b 7
IN
pin function
b 6
b 5
Item
b 4
b 3
b 2
b 1
0
b 0
0
N o t e s 1 : T i m e r B 0 .
B i t s y m b o l
T M O D 0
T M O D 1
f
• Counts down
• When the timer underflows, it reloads the reload register contents before continuing
1/(n+1)
Count start flag is set (= 1)
Count start flag is reset (= 0)
The timer underflows
Programmable I/O port
Count value is read out by reading timer Bi register
• When counting stopped
• When counting in progress
T C K 0
T C K 1
1
M R 0
M R 1
M R 2
M R 3
S y m b o l
T B i M R ( i = 0 t o 2 )
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
, f
counting
When a value is written to timer Bi register, it is written to both reload register and counter
When a value is written to timer Bi register, it is written to only reload register
2 : T i m e r B 1 , t i m e r B 2 .
8
(Transferred to counter at next reload time)
, f
32
, f
N o t h i n g i s a s s i g n e d ( i = 1 , 2 ) .
I n a n a t t e m p t t o w r i t e t o t h i s b i t , w r i t e “ 0 . ” T h e v a l u e , i f r e a d , t u r n s o u t t o
b e i n d e t e r m i n a t e .
O p e r a t i o n m o d e s e l e c t b i t
I n v a l i d i n t i m e r m o d e
C a n b e “ 0 ” o r “ 1 ”
0 ( F i x e d t o “ 0 ” i n t i m e r m o d e ; i = 0 )
I n v a l i d i n t i m e r m o d e .
I n a n a t t e m p t t o w r i t e t o t h i s b i t , w r i t e “ 0 . ” T h e v a l u e , i f r e a d i n
t i m e r m o d e , t u r n s o u t t o b e i n d e t e r m i n a t e .
C o u n t s o u r c e s e l e c t b i t
C32
n : Set value
B i t n a m e
0 3 9 B
A d d r e s s
1 6
t o 0 3 9 D
1 6
Specification
0 0 : T i m e r m o d e
0 0 : f
0 1 : f
1 0 : f
1 1 : f
b 1 b 0
b 7 b 6
W h e n r e s e t
0 0 ? X 0 0 0 0
1
8
3 2
C 3 2
F u n c t i o n
2
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M306V2ME-XXXFP
( N o t e 2 )
( N o t e 1 )
M306V2EEFP
R
W
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