參數(shù)資料
型號(hào)： ML64168-XXX
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 0.7 MHz, MICROCONTROLLER, UUC80
封裝： DIE-80
文件頁數(shù)： 36/49頁
文件大小： 317K
代理商： ML64168-XXX
FEDL64168-01
Semiconductor
ML64168
41/49
Capture circuit ( CAPR )
The ML64168 captures 32Hz to 256Hz output of the time base counter at the falling of Port 0.0 or
Port 0.1 ( P0.0 or P0.1 ) to “L” level when the pull-up resistor input is chosen, or at the rising to “H”
level when the pull-down resistor input is chosen. The capture circuit is composed of the Capture
Control Register ( CAPCON ) and the Capture Registers ( CAPR0, CAPR1 ) that fetch output from
the time base counter.
Watchdog timer ( WDT )
The ML64168 has a built-in watchdog timer to detect CPU malfunction. The watchdog timer is
composed of a 6-bit watchdog timer counter ( WDTC ) to count a 16Hz output and a watchdog timer
control register ( WDTCON ) to reset WDTC.
Clock generation circuit ( 2CLK )
The clock generation circuit ( 2CLK ) in the ML64168 contains a 32.768kHz crystal oscillation
circuit, a 700kHz RC oscillation circuit, and a clock control port. This circuit generates the system
clock ( CLK ) and the time base clock ( 32.768kHz ).
The system clock drives the CPU while the time base clock drives the time base counter and the
buzzer driver.
Via the contents of the Frequency Control Register ( FCON ), the system clock can be switched
between 32.768kHz ( the output of the crystal oscillation circuit ) and 700kHz ( the output of the RC
oscillation circuit ).
Note: The oscillation frequency of the RC oscillation circuit varies depending on the value of an
external resistor ( ROS ), operating power supply voltage ( VDD ), and ambient temperatures
(Ta).
Time base counter ( TBC )
The ML64168 has a built-in time base counter ( TBC ) that generates clocks to be supplied to internal
peripheral circuit. The time base counter is composed of 15 binary counters, and a 1/10 frequency
dividing circuit. The count clock of the time base is driven by the oscillation clock ( 32.768kHz ) of
the crystal oscillation circuit. The output of the time base counter is used for the buzzer driver, the
system reset circuit, the watchdog timer, the time base interrupt, the sampling clocks of each port, and
the capture circuit.
I/O port
Input-output ports ( P2, P3, P4 )
: 3 ports
× 4bits
Pull-up ( pull-down ) resistor input or high-impedance input, CMOS output or NMOS open
drain output: these can be specified for each bit; external 0 interrupt
Input port ( P0 )
: 1 port
× 4bits
Pull-up ( pull-down ) resistor input or high-impedance input; external 1 interrupt
Output port ( P1 )
: 1 port
× 4bits
CMOS output or NMOS open drain output
相關(guān)PDF資料
PDF描述
ML64P168-NGP 4-BIT, OTPROM, 0.7 MHz, MICROCONTROLLER, PQFP80
ML64P168-NGA 4-BIT, OTPROM, 0.7 MHz, MICROCONTROLLER, PQFP80
ML64P168-NGP 4-BIT, OTPROM, 0.7 MHz, MICROCONTROLLER, PQFP80
ML64P168-NGA 4-BIT, OTPROM, 0.7 MHz, MICROCONTROLLER, PQFP80
ML66517-GA 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PDIP64
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