MC908MR8MPE Freescale Semiconductor, MC908MR8MPE Datasheet - Page 100
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MC908MR8MPE
Manufacturer Part Number
MC908MR8MPE
Description
IC MCU 8BIT 8K FLASH 28-PDIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MCHC908MR8VFAE.pdf
(372 pages)
Specifications of MC908MR8MPE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
LVD, POR, PWM
Number Of I /o
12
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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System Integration Module (SIM)
7.6.1 Interrupts
Technical Data
100
INTERRUPT
MODULE
I BIT
R/W
IAB
IDB
DUMMY
DUMMY
At the beginning of an interrupt, the CPU saves the CPU register
contents on the stack and sets the interrupt mask (I bit) to prevent
additional interrupts. At the end of an interrupt, the return from interrupt
(RTI) instruction recovers the CPU register contents from the stack so
that normal processing can resume.
timing.
Interrupts are latched, and arbitration is performed in the SIM at the start
of interrupt processing. The arbitration result is a constant that the CPU
uses to determine which vector to fetch. Once an interrupt is latched by
the SIM, no other interrupt can take precedence, regardless of priority,
until the latched interrupt is serviced (or the I bit is cleared). See
Figure
SP
PC – 1[7:0] PC – 1[15:8]
SP – 1
Figure 7-10
7-9.
Figure 7-8
System Integration Module (SIM)
SP – 2
X
shows interrupt recovery timing.
.
SP – 3
Interrupt Entry
A
SP – 4
CCR
VECT H
Figure 7-8
V DATA H
VECT L START ADDR
MC68HC908MR8 — Rev 4.1
V DATA L
shows interrupt entry
Freescale Semiconductor
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