MC68HC705KJ1CP Freescale Semiconductor, MC68HC705KJ1CP Datasheet - Page 71

• Manufacturer Part Number: MC68HC705KJ1CP
• Description: IC MCU 4MHZ 1.2K OTP 16-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705KJ1CP

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 10
• Program Memory Size: 1.2KB (1.2K x 8)
• Program Memory Type: OTP
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

Chapter 8
Resets and Interrupts
8.1 Introduction
Reset initializes the MCU by returning the program counter to a known address and by forcing control and
status bits to known states.
Interrupts temporarily change the sequence of program execution to respond to events that occur during
processing.
8.2 Resets
A reset immediately stops the operation of the instruction being executed, initializes certain control and
status bits, and loads the program counter with a user-defined reset vector address. The following
sources can generate a reset:
Freescale Semiconductor
•
•
•
•
Power-on reset (POR) circuit
RESET pin
Computer operating properly (COP) watchdog
Illegal address
RESET PIN
V
DD
MC68HC705KJ1 • MC68HRC705KJ1 • MC68HLC705KJ1 Data Sheet, Rev. 4.1
ILLEGAL ADDRESS
POWER-ON RESET
COP WATCHDOG
Figure 8-1. Reset Sources
INTERNAL CLOCK
D
CK
RESET
LATCH
S
Q
RST
TO CPU AND
PERIPHERAL
MODULES
71