參數(shù)資料
型號： M30100
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述： 單片16位CMOS微機(jī)
文件頁數(shù)： 89/164頁
文件大?。?/td> 3302K
代理商： M30100
deveopment
Tentative Specifications REV.E1
Timer Z
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
88
(3) Programmable one-shot generation mode
In this mode, upon software command or external trigger input (input to the INT0 pin), the microcom-
puter outputs the one-shot pulse from the TZ
OUT
pin. (See Table 1.14.12) When a trigger occurs, the
timer starts operating from the point only once for a given period equal to the set value of the Timer Z
primary. Timer Z secondary is unused in this mode. Figure 1.14.27 shows the Timer Y, Z mode
register and Timer Y, Z waveform output control register in this mode. Figure 1.14.28 shows the Timer
Z operation example in this mode.
Item
Specification
Count source
Count operation
f
1
, f
8
, Timer Y underflow, f
C32
Downcounts the set value of Timer Z primary
When the timer underflows, it reloads the contents of reload register before stopping
counting.
When a counting stops, the timer reloads the contents of the reload register before it
stops.
1/(n+1)/(m+1)
n : Set value of Prescaler Z, m: Set value of Timer Z primary
Timer Z one-shot start bit is set (=1)
(Note 1)
Valid trigger is input to INT0 pin
(Note 2)
When reloading is completed after count value was set to "00
16
"
When Count start flag is reset (=0)
(Note 3)
Timer Z one-shot start bit is reset (=0)
(Note 3)
Interrupt request generation timing
When count value becomes "00
16
"
OUT
pin function
Pulse output
_______
Programmable I/O port, external interrupt input pin, or external trigger input pin
Read from timer
Count value can be read out by reading Timer Z primary register.
Same applies to Prescaler Z register.
Write to timer
When a value is written to Timer Z primary register, it is written to only reload register.
Same applies to Prescaler Z register.
(Note 4)
Select function
Output level latch select function
INT0 pin one-shot trigger control function and polarity select function
The trigger input from the INT0 pin can be set to valid or invalid. Also, the valid trigger's
polarity can be chosen to be the rising edge, falling edge, or rising and falling both
edges.
Waveform extend function
The one-shot pulse waveform can be extended 0.5 cycles of the count source
(Note 5)
Frequency when waveform extended: 2/(n+1)/(2x(m+1)+TZPUM0)
n: set value of Prescaler Z, m: set value of Timer Z primary
TZPUM0: Timer Z primary waveform extension control bit
Note 1: Count start flag must have been set to "1".
Note 2: Count start flag must have been set to "1", INT0 input enable bit [INT0EN] to "1", and INT0 one-shot trigger
control bit to "1".
Note 3: When the count is stopped by writing 0 to the count start flag or Timer Z one-shot start bit, the Timer Z interrupt
request flag becomes "1" and an interrupt may occur. Thus, interrupts must be disabled before the count is
stopped. Furthermore, set the Timer Z interrupt request bit to "0" before starting counting again.
Note 4: Each set value becomes effective by writing to the Timer Z primary register. And the set values are reflected
collectively beginning with the next one-shot pulse after writing to the Timer Z primary.
Note 5: When using the waveform extend function, the Prescaler Z register must be set to "00
16
".
When selecting Timer Y underflow and f
1
for the count source, the waveform extend function cannot be used.
Divide ratio
Count start condition
Count stop condition
Table 1.14.12. Specifications of programmable one-shot generating mode
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