MCF5307CFT66B Freescale Semiconductor, MCF5307CFT66B Datasheet - Page 407
MCF5307CFT66B
Manufacturer Part Number
MCF5307CFT66B
Description
IC MPU 32BIT 66MHZ COLDF 208FQFP
Manufacturer
Freescale Semiconductor
Series
MCF530xr
Datasheets
1.MCF5307AI66B.pdf
(484 pages)
2.MCF5307AI66B.pdf
(16 pages)
3.MCF5307AI66B.pdf
(2 pages)
Specifications of MCF5307CFT66B
Core Processor
Coldfire V3
Core Size
32-Bit
Speed
66MHz
Connectivity
EBI/EMI, I²C, UART/USART
Peripherals
DMA, POR, WDT
Number Of I /o
16
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
208-FQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
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18.7.2 Interrupt-Acknowledge Cycle
When the MCF5307 processes an interrupt exception, it performs an interrupt-
acknowledge bus cycle to obtain the vector number that contains the starting location of the
interrupt exception handler. The interrupt-acknowledge bus cycle is a read transfer that
differs from normal read cycles in the following respects:
During the interrupt-acknowledge bus cycle (a read cycle), the responding device places the
vector number on D[31:24] and the cycle is terminated normally with TA. Figure 18-23 is
a flow diagram for an interrupt-acknowledge cycle terminated with TA.
• The interrupt request on the interrupt control pins is raised to level 7 and stays there
• The interrupt request on the interrupt control pins is raised to level 7 and stays there.
• TT[1:0] = 0x3 to indicate a CPU space or acknowledge bus cycle.
• TM[2:0] = the level of interrupt being acknowledged.
• A[31:5] = 0x7F_FFFF.
• A[4:2] = the interrupt request level being acknowledged (same as TM[2:0]).
• A[1:0] = 00.
until an interrupt-acknowledge cycle begins. The level later drops but then returns to
level 7, causing a second transition on the interrupt control lines.
If the level 7 interrupt routine lowers the mask level, a second level 7 interrupt is
recognized without a transition of the interrupt control pins. After the level 7 routine
completes, the MCF5307 compares the mask level to the request level on the IRQx
signals. Because the mask level is lower than the requested level, the interrupt mask
is set back to level 7. To ensure it is recognized, the level 7 request on IRQ7 must be
held until the second interrupt-acknowledge bus cycle begins.
Freescale Semiconductor, Inc.
For More Information On This Product,
Chapter 18. Bus Operation
Go to: www.freescale.com
Interrupt Exceptions
18-19
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