MC68HC705JP7CDW Freescale Semiconductor, MC68HC705JP7CDW Datasheet - Page 34
MC68HC705JP7CDW
Manufacturer Part Number
MC68HC705JP7CDW
Description
IC MCU 8BIT 28-SOIC
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet
1.MC705JJ7CDWE.pdf
(164 pages)
Specifications of MC68HC705JP7CDW
Core Processor
HC05
Core Size
8-Bit
Speed
2.1MHz
Connectivity
SIO
Peripherals
POR, Temp Sensor, WDT
Number Of I /o
22
Program Memory Size
6KB (6K x 8)
Program Memory Type
OTP
Ram Size
224 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Interrupts
4.3 Interrupt Processing
To begin servicing an interrupt, the CPU does these actions:
The return-from-interrupt (RTI) instruction causes the CPU to recover its register contents from the stack
as shown in
Figure
34
•
•
•
Stores the CPU registers on the stack in the order shown in
Sets the I bit in the condition code register to prevent further interrupts
Loads the program counter with the contents of the appropriate interrupt vector locations as shown
in
4-2.
Table 4-1
Figure
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
4-1. The sequence of events caused by an interrupt is shown in the flowchart in
$00BE
$00FD
$00BF
$00C0
$00C1
$00C2
$00FE
$00FF
$0020
$0021
n+1
n+2
n+3
n+4
n
Figure 4-1. Interrupt Stacking Order
Program Counter (High Byte)
Program Counter (Low Byte)
Condition Code Register
Top of Stack (RAM)
Bottom of Stack
Bottom of RAM
Index Register
Accumulator
Stacking
Order
Figure 4-1
5
4
3
2
1
›
Unstacking
Order
?
1
2
3
4
5
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