參數(shù)資料
型號(hào): AT42QT1110-MZ
廠商: ATMEL CORP
元件分類: 速度傳感器和接近開(kāi)關(guān)
英文描述: PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT
封裝: 5 X 5 MM, 0.50 MM PITCH, ROHS COMPLIANT, MO-220VHHD-2, QFN-32
文件頁(yè)數(shù): 23/46頁(yè)
文件大?。?/td> 657K
代理商: AT42QT1110-MZ
31
4519 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
TIMERS
The 4519 Group has the following timers.
Programmable timer
The programmable timer has a reload register and enables the
frequency dividing ratio to be set. It is decremented from a set-
ting value n. When it underflows (count to n + 1), a timer interrupt
request flag is set to “1,” new data is loaded from the reload reg-
ister, and count continues (auto-reload function).
Fixed dividing frequency timer
The fixed dividing frequency timer has the fixed frequency divid-
ing ratio (n). An interrupt request flag is set to “1” after every n
count of a count pulse.
Fig. 24 Auto-reload function
The 4519 Group timer consists of the following circuits.
Prescaler : 8-bit programmable timer
Timer 1 : 8-bit programmable timer
Timer 2 : 8-bit programmable timer
Timer 3 : 8-bit programmable timer
Timer 4 : 8-bit programmable timer
Watchdog timer : 16-bit fixed dividing frequency timer
(Timers 1, 2, 3, and 4 have the interrupt function, respectively)
Prescaler and timers 1, 2, 3, and 4 can be controlled with the timer
control registers PA, W1 to W6. The watchdog timer is a free
counter which is not controlled with the control register.
Each function is described below.
FF16
n
0016
n : Counter initial value
Count starts
Reload
1st underflow
2nd underflow
n+1 count
Time
An interrupt occurs or
a skip instruction is executed.
Timer interrupt
request flag
T
h
e
c
o
n
te
n
ts
o
f
c
o
u
n
te
r
“1”
“0”
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