参数资料
型号: MC68HC05C8ACB
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42
封装: SHRINK, PLASTIC, DIP-42
文件页数: 72/156页
文件大小: 755K
代理商: MC68HC05C8ACB
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Description
General Release Specification
MC68HC05C8A Rev. 3.0
22
General Description
MOTOROLA
1.5.1 V
DD and VSS
Power is supplied to the microcontroller using these two pins. V
DD is the
positive supply and V
SS is ground.
1.5.2 IRQ
This pin has a mask selectable option that provides two different choices
of interrupt triggering sensitivity. The IRQ pin contains an internal
Schmitt trigger as part of its input to improve noise immunity. Refer to
Section 4. Interrupts for more detail.
1.5.3 OSC1 and OSC2
These pins provide control input for an on-chip clock oscillator circuit. A
crystal, a ceramic resonator, a resistor/capacitor combination, or an
external signal connects to these pins providing a system clock. The
internal bus rate is one-half the external oscillator frequency.
1.5.4 RESET
This active low pin is used to reset the MCU to a known startup state by
pulling RESET low. The RESET pin contains an internal Schmitt trigger
as part of its input to improve noise immunity.
1.5.5 TCAP
This pin controls the input capture feature for the on-chip programmable
timer. The TCAP pin contains an internal Schmitt trigger as part of its
input to improve noise immunity.
1.5.6 TCMP
The TCMP pin provides an output for the output compare feature of the
on-chip timer subsystem.
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