M306V0ME Mitsubishi, M306V0ME Datasheet - Page 88

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

88
Table 2.10.3 Timer specifications in one-shot timer mode
Figure 2.10.13 Timer Ai mode register in one-shot timer mode (i = 0 to 4)
(3) One-shot timer mode
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing The count reaches 0000
TA2
Read from timer
Write to timer
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.
OUT
/TA3
Item
OUT
Timer Ai mode register
b7
b6
pin function Programmable I/O port or pulse output
b5
0
b4
b3
0
b2
b1
1 0
f
• The timer counts down
• When the count reaches 0000
• If a trigger occurs when counting, the timer reloads a new count and restarts counting
1/n
• The timer overflows
• The one-shot start flag is set (= 1)
• A new count is reloaded after the count has reached 0000
• The count start flag is reset (= 0)
When timer Ai register is read, it indicates an indeterminate value
• When counting in progress
1
• When counting stopped
, f
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
b0
When a value is written to timer Ai register, it is written to both reload register and
counter
When a value is written to timer Ai register, it is written to only reload register
(Transferred to counter at next reload time)
8
, f
Reserved bits
Notes 1 : The settings of the corresponding port register and port direction register
Bit symbol
32
TMOD0
TMOD1
n : Set value
TCK0
TCK1
MR0
MR2
MR3
, f
Symbol
TAiMR(i = 0 to 4)
C32
2 : This bit of TAiMR (i = 0, 1, 4) must always be set to “0.”
are invalid.
Operation mode select bit
Pulse output function
select bit
(Note 2)
Trigger select bit
0 (Must always be set to “0” in one-shot timer mode)
Count source select bit
Bit name
0396
16
16
Address
to 039A
16
Specification
, the timer stops counting after reloading a new count
16
b1 b0
1 0 : One-shot timer mode
0 : Pulse is not output
1 : Pulse is output (Note 1)
0 : Count start flag is valid
1 : Selected by event/trigger select register
b7 b6
0 0 : f
0 1 : f
1 0 : f
1 1 : f
Must always be set to “0”
When reset
(TA2
(TA2
1
8
32
C32
00
OUT
OUT
16
/TA3
/TA3
and ON-SCREEN DISPLAY CONTROLLER
OUT
OUT
MITSUBISHI MICROCOMPUTERS
Function
pin is a normal port pin)
pin is a pulse output pin)
M306V0ME-XXXFP
16
M306V0EEFP
R
W
Rev. 1.0