MC68HC705C8ACB Freescale Semiconductor, MC68HC705C8ACB Datasheet - Page 52

• Manufacturer Part Number: MC68HC705C8ACB
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705C8ACB

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 2.1MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 304Byte
• # I/os (max): 24
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 42
• Package Type: SPDIP
• Lead Free Status / Rohs Status: Not Compliant

Interrupts
Technical Data
52
CONNECTION
USED WITH
NORMALLY
WIRED-OR
b. Level-Sensitive Trigger Condition. If the interrupt line remains low after servicing an interrupt, then the
INTERRUPT PIN
a. Edge-Sensitive Trigger Condition. The minimum pulse width (t
CPU continues to recognize an interrupt.
or 250 ns (f
execute the interrupt service routine plus 19 t
IRQ PIN
(INTERNAL)
Figure 4-1. External Interrupt Internal Function Diagram
IRQ
IRQ
.
.
.
IRQ
OP
1
n
EDGE- AND LEVEL-SENSITIVE TRIGGER
= 1 MHz). The period t
V
DD
Freescale Semiconductor, Inc.
OPTION REGISTER
Figure 4-2. External Interrupt Timing
For More Information On This Product,
D
C
IRQ LATCH
t
ILIH
R
Go to: www.freescale.com
Q
Q
ILIL
should not be less than the number of t
t
ILIH
Interrupts
CYC
t
ILIL
cycles.
I BIT (CCR)
ILIH
) is either 125 ns (f
POR
INTERNAL RESET (COP)
EXTERNAL RESET
EXTERNAL INTERRUPT BEING SERVICED
(VECTOR FETCH)
EXTERNAL
INTERRUPT
REQUEST
CYC
MC68HC705C8A — Rev. 3
cycles it takes to
OP
= 2.1 MHz)