參數(shù)資料
型號(hào)： MB90F498GPMC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64
封裝： 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LFQFP-64
文件頁數(shù)： 35/96頁
文件大?。?/td> 2317K
代理商： MB90F498GPMC
MB90495G Series
40
DS07-13713-6E
Block Diagram of 16-bit Free-run Timer
IVF
IVFE STOP
CLR
CLK2 CLK1 CLK0
OF
FRCK
2
φ
STOP
CLK
CLR
Pin
Prescaler
Timer counter control
status register
(TCCS)
Timer counter data register (TCDT)
16-bit free-run timer
Re-
Output count value
to input capture
Inter
nal
data
b
us
Free-run timer
interrupt request
Note: The 16-bit I/O timer contains one 16-bit free-run timer.
The interrupt request number of the 16-bit free-run timer is as follows :
Interrupt request number : 19 (13H)
Prescaler: Takes a fraction of the machine clock, and supplies a count clock to the 16-bit up-counter. One of
four machine clock fractions can be selected by setting the timer counter control status register
(TCCS) .
Timer Counter Register (TCDT) :
This is a 16-bit up-counter. It is possible to read the current counter value of the 16-bit free-run timer
by reading this counter. The counter can be set to an arbitrary value by writing to it while stopped.
Timer Counter Control Status Register (TCCS) :
TCCS selects the divide ratio of a machine clock, executes software clear of counter values. and
enables or disables counter operation. Also TCCS confirms and clears an overflow generation flag,
and enables or disables interruption.
φ
: Machine clock
OF
: overflow
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