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M306V5ME-XXXSP Datasheet(PDF) 77 Page - Mitsubishi Electric Semiconductor

Part No. M306V5ME-XXXSP
Description  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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Maker  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
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M306V5ME-XXXSP Datasheet(HTML) 77 Page - Mitsubishi Electric Semiconductor

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M306V5ME-XXXSP
M306V5EESP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
77
Rev. 1.0
Figure 2.10.13 Timer Ai mode register in one-shot timer mode (i = 0 to 4)
(3) One-shot timer mode
In this mode, the timer operates only once. (See Table 2.10.3.) When a trigger occurs, the timer starts up
and continues operating for a given period. Figure 2.10.13 shows the timer Ai mode register in one-shot
timer mode.
Table 2.10.3 Timer specifications in one-shot timer mode
Item
Specification
Count source
f1, f8, f32
Count operation
• The timer counts down
• When the count reaches 000016, the timer stops counting after reloading a new count
• If a trigger occurs when counting, the timer reloads a new count and restarts counting
Divide ratio
1/n
n : Set value
Count start condition
• The timer overflows
• The one-shot start flag is set (= 1)
Count stop condition
• A new count is reloaded after the count has reached 000016
• The count start flag is reset (= 0)
Interrupt request generation timing
The count reaches 000016
TA2OUT/TA3OUT pin function Programmable I/O port or pulse output
Read from timer
When timer Ai register is read, it indicates an indeterminate value
Write to timer
• When counting stopped
When a value is written to timer Ai register, it is written to both reload register and
counter
• When counting in progress
When a value is written to timer Ai register, it is written to only reload register
(Transferred to counter at next reload time)
Bit name
Timer Ai mode register
Symbol
Address
When reset
TAiMR(i = 0 to 4)
039616 to 039A16
0016
Function
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
Operation mode select bit
1 0 : One-shot timer mode
b1 b0
TMOD1
TMOD0
MR0
Pulse output function
select bit
(Note 2)
0 : Pulse is not output
(TA2OUT/TA3OUT pin is a normal port pin)
1 : Pulse is output (Note 1)
(TA2OUT/TA3OUT pin is a pulse output pin)
Reserved bits
10
0
Must always be set to “0”
W
R
0
MR3
0 (Must always be “0” in one-shot timer mode)
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : Do not set
b7 b6
TCK1
TCK0
Count source select bit
MR2
Trigger select bit
0 : Count start flag is valid
1 : Selected by event/trigger select register
Notes 1 : The settings of the corresponding port register and port direction register
are invalid.
2 : This bit of TAiMR (i = 0, 1, 4) must always be set to “0.”


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