MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 108

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Resets and Interrupts
5.2 Introduction
5.3 Resets
Technical Data
108
5.7
5.7.1
5.7.2
Resets and interrupt operations load the program counter with a vector
that points to a new location from which instructions are to be fetched. A
reset immediately stops execution of the current instruction and forces
the program counter to a known starting address. Internal registers and
control bits are initialized so the MCU can resume executing instructions.
An interrupt temporarily suspends normal program execution while an
interrupt service routine is being executed. After an interrupt has been
serviced, the main program resumes as if there had been no
interruption.
The four possible sources of reset are:
POR and RESET share the normal reset vector. COP reset and the
clock monitor reset each has its own vector.
•
•
•
•
Power-on reset (POR)
External reset (RESET)
Computer operating properly (COP) reset
Clock monitor reset
Low-Power Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130
Resets and Interrupts
M68HC11E Family — Rev. 3.2
MOTOROLA