XC68HC12A0CPV8 Freescale Semiconductor, XC68HC12A0CPV8 Datasheet - Page 128
![IC, 16BIT MCU, 68HC12, 8MHZ, TQFP-112](/photos/19/7/190728/4243102_sml.jpg)
XC68HC12A0CPV8
Manufacturer Part Number
XC68HC12A0CPV8
Description
IC, 16BIT MCU, 68HC12, 8MHZ, TQFP-112
Manufacturer
Freescale Semiconductor
Datasheet
1.MC912D60ACFUE8.pdf
(460 pages)
Specifications of XC68HC12A0CPV8
Controller Family/series
68HC12
No. Of I/o's
68
Eeprom Memory Size
1KB
Ram Memory Size
2KB
Cpu Speed
8MHz
No. Of Timers
1
Core Size
16 Bit
Program Memory Size
60KB
Peripherals
ADC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Resets and Interrupts
9.9 Customer Information
Technical Data
128
required to complete the instruction. Some of the longer instructions can
be interrupted and will resume normally after servicing the interrupt.
When the CPU begins to service an interrupt, the instruction queue is
cleared, the return address is calculated, and then it and the contents of
the CPU registers are stacked as shown in
After the CCR is stacked, the I bit (and the X bit, if an XIRQ interrupt
service request is pending) is set to prevent other interrupts from
disrupting the interrupt service routine. The interrupt vector for the
highest priority source that was pending at the beginning of the interrupt
sequence is fetched, and execution continues at the referenced location.
At the end of the interrupt service routine, an RTI instruction restores the
content of all registers from information on the stack, and normal
program execution resumes.
If another interrupt is pending at the end of an interrupt service routine,
the register unstacking and restacking is bypassed and the vector of the
interrupt is fetched.
Before disabling an interrupt using a local interrupt control bit, set the I
mask bit in the CCR. Failing to do so may cause an SWI interrupt to be
fetched instead of the vector for the interrupt source that was disabled.
Table 9-2. Stacking Order on Entry to Interrupts
Resets and Interrupts
Memory Location
SP – 2
SP – 4
SP – 6
SP – 8
SP – 9
CPU Registers
RTN
Y
X
Table
B : A
CCR
H
H
H
MC68HC912D60A — Rev. 3.1
: RTN
: Y
: X
L
L
9-2.
Freescale Semiconductor
L
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