參數(shù)資料
型號(hào)： M30240S9-XXXFP
廠商： Mitsubishi Electric Corporation
英文描述： 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
中文描述： 單片16位CMOS微機(jī)
文件頁數(shù)： 77/142頁
文件大小： 1637K
代理商： M30240S9-XXXFP
1-77
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV. E
Specifications in this manual are tentative and subject to change
Timer A
2.21.3 One-shot timer mode
In this mode, the timer operates only once (See Table 1.20 ). When a trigger occurs, the timer starts
up and continues operating for a given period. Figure 1.66 shows the timer Ai mode register in one-
shot mode.
Figure 1.66: Timer Ai mode register in one-shot mode
Table 1.20:
Timer specifications in one-shot timer mode
Item
Specification
Count source
f1, f8, f32
Count operation
The timer counts down
When the count reaches 0000
16
, 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 selected timer overflows
The one-shot start flag is set (= 1)
Count stop condition
A new count is reloaded after the count has reached 0000
16
The count start flag is reset (= 0)
Interrupt request
generation tim
ing
The count reaches 0000
16
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 is stopped and a value is written to timer Ai register, it is written to both
reload register and counter
When counting is in progress and a value is written to timer Ai register, it is written to the
reload register to be transferred to counter at next load time
Bit name
Timer Ai mode register
Symbol
TAiMR(i = 0 to 4) 0396
16
to 039A
16
Address
When reset
00
16
Function
Bit symbol
TMOD0
b7
b6
b5
0
b4
b3
b2
b1
1 0
b0
Operation mode select bit
1 0 : One-shot timer mode
b1 b0
TMOD1
MR0
Pulse output function
select bit
0 : Pulse is not output
(TA
iOUT
pin is a normal port pin)
1 : Pulse is output (Note 1)
(TAi
OUT
pin is a pulse output pin)
MR2
MR1
MR3
0 (Must always be “0” in one-shot timer mode)
0 0 : f
1
0 1 : f
8
1 0 : f
1 1 : invalid
b7 b6
TCK1
TCK0
Count source select bit
0 : One-shot start flag is valid
1 : Selected by event/trigger select
register
Trigger select bit
External trigger select
bit (Note 2)
IN
0 : Falling edge of TAi
IN
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 0383
16
). 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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