參數(shù)資料
型號： M30240M1-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, MICROCONTROLLER, PQFP80
封裝： 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù)： 95/125頁
文件大小： 753K
代理商： M30240M1-XXXFP
Mitsubishi microcomputers
M16C / 24 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
73
CONFIDENTIAL
Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change
Timer A
(3) One-shot timer mode
In this mode, the timer operates only once. (See Table 19 .) When a trigger occurs, the timer starts
up and continues operating for a given period. Figure 66 shows the timer Ai mode register in one-shot
mode.
Figure 66:
Timer Ai mode register in one-shot mode
Table 19:
Timer specications in one-shot timer mode
Item
Specication
Count source
f1, f8, f32
Count operation
The timer counts down
When the count reaches000016, 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
An external trigger is input
The timer overows
The one-shot start ag is set (= 1)
Count stop condition
A new count is reloaded after the count has reached 000016
The count start ag is reset (= 0)
Interrupt request
generation timing
The count reaches 000016
TAiIN pin function
Programmable I/O port or trigger input
TAiOUT 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
0 : Pulse is not output
(TAiOUT pin is a normal port pin)
1 : Pulse is output (Note 1)
(TAiOUT pin is a pulse output pin)
MR2
MR1
MR3
0 (Must always be “0” in one-shot timer mode)
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : invalid
b7 b6
TCK1
TCK0
Count source select bit
10
0
0 : One-shot start flag is valid
1 : Selected by event/trigger select
register
Trigger select bit
External trigger select
bit (Note 2)
0 : Falling edge of TAi IN pin's input signal (Note 3)
1 : Rising edge of TAiIN pin's input signal (Note 3)
Note 1: The settings of the corresponding port register and port direction register are invalid.
Note 2: Valid only when the TA iIN pin is selected by the event/trigger select bit
(addresses 0382 16 and 038316). If timer overflow is selected, this bit can be “1” or “0”.
Note 3: Set the corresponding port direction register to “0”.
W
R
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