參數(shù)資料
型號: MC68HC705SB7
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 81/170頁
文件大?。?/td> 2161K
代理商: MC68HC705SB7
GENERAL RELEASE SPECIFICATION
August 27, 1998
MOTOROLA
GENERAL DESCRIPTION
MC68HC05SB7
1-6
REV 2.1
option is selected to include level-sensitive triggering, the IRQ/VPP input requires
an external resistor to VDD for “wired-OR” operation, if desired. If the IRQ/VPP pin
is not used, it must be tied to the VDD supply. The IRQ/VPP pin contains an internal
Schmitt trigger as part of its input to improve noise immunity. The voltage on this
pin may affect the mode of operation and should not exceed VDD.
The IRQ/VPP pin is also used for programming voltage when programming the
Personality EPROM.
See section on Interrupts for more details.
1.6.4 RESET
The RESET pin can be used as an input to reset the MCU to a known start-up
state by pulling it to the low state. It also functions as an output to indicate that an
internal COP watchdog, illegal address, or low voltage reset has occurred. The
RESET pin contains a pullup device to allow the pin to be left disconnected with-
out an external pullup resistor. The RESET pin also contains a steering diode that,
when the power is removed, will discharge to VDD any charge left on an external
capacitor connected between the RESET pin and VSS. The RESET pin also con-
tains an internal Schmitt trigger to improve its noise immunity as an input.
See section on Resets for more details.
1.6.5 CSA
This pin is the input to the current sense amplier. Usually one terminal of the cur-
rent path shunt sensing resistor of 0.01
is connected to this input pin. The other
terminal is connected to VSS.
See section on Current Sense Amplier for more details.
1.6.6 TM
This pin is fed from the output of an external temperature sensor. Usually a ther-
mistor with a resistor forms a voltage divider with the voltage value applied to this
input.
See section on Temperature Sensor for more details.
1.6.7 VM
This pin is the battery voltage input of the voltage measurement circuit.
See section on Temperature Sensor for more details.
1.6.8 CAP (ADC)
This pin is connected to an external ramp capacitor to form the slope voltage con-
verter.
See section on Analog Subsystem for more details.
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