MC68HC705C8ACFB Freescale Semiconductor, MC68HC705C8ACFB Datasheet - Page 52

• Manufacturer Part Number: MC68HC705C8ACFB
• Description: IC MCU 8K 4MHZ OTP 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C8ACFB

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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)
MOTOROLA