MC68302EH16C Freescale Semiconductor, MC68302EH16C Datasheet - Page 102
MC68302EH16C
Manufacturer Part Number
MC68302EH16C
Description
IC MPU MULTI-PROTOCOL 132-PQFP
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68302AG20C.pdf
(4 pages)
2.MC68302AG20C.pdf
(2 pages)
3.MC68302AG20C.pdf
(13 pages)
4.MC68302EH16C.pdf
(481 pages)
Specifications of MC68302EH16C
Processor Type
M683xx 32-Bit
Speed
16MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-MQFP, 132-PQFP
Controller Family/series
68K
Core Size
32 Bit
Ram Memory Size
1152Byte
Cpu Speed
16MHz
No. Of Timers
3
Embedded Interface Type
SCP, TDM
Digital Ic Case Style
PQFP
Rohs Compliant
Yes
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
16MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
5V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
132
Package Type
PQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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- MC68302AG20C PDF datasheet
- MC68302AG20C PDF datasheet #2
- MC68302AG20C PDF datasheet #3
- MC68302EH16C PDF datasheet #4
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- Download datasheet (2Mb)
System Integration Block (SIB)
HWT—Hardware Watchdog Timeout
WPV—Write Protect Violation
ADC—Address Decode Conflict
3.8.3 System Control Bits
The system control logic uses six control bits in the SCR.
WPVE—Write Protect Violation Enable
3-52
This bit is set when the hardware watchdog (see 3.8.6 Hardware Watchdog) reaches the
end of its time interval; BERR is generated following the watchdog timeout, even if this bit
is already set.
This bit is set when a bus master attempts to write to a location that has RW set to zero
(read only) in its associated base register (BR3–BR0). Provided WPVE (bit 20) is set,
BERR will be asserted on the bus cycle that sets this bit. If WPV and WPVE are both set
when a write protect violation occurs, BERR will still be generated.
This bit is set when a conflict has occurred in the chip-select logic because two or more
chip-select lines attempt assertion in the same bus cycle. This conflict may be caused by
a programming error in which the user-allocated memory areas for each chip select over-
lap each other. Provided ADCE (bit 17) is set, the occurrence of ADC will cause BERR to
be asserted. If this bit is already set when another address decode conflict occurs, BERR
will still be generated. The chip-select logic will protect the IMP from issuing two simulta-
neous chip selects by employing a priority system.
After system reset, this bit defaults to zero.
0 = BERR is not asserted when a write protect violation occurs.
1 = BERR is asserted when a write protect violation occurs.
this happens and that other pending interrupts at the same orig-
inal priority level also execute with BCLR continuously asserted,
the following technique may be used. Using a parallel I/O line
connected to the IRQ1 line, the original priority level interrupt
toggles this I/O line just before it executes the RTE instruction,
causing a request for a level 1 interrupt. Since this is the lowest
interrupt level, this routine will not be executed until all other
pending interrupt routines have executed. Then in the level 1 in-
terrupt routine, the IPA bit in the SCR is cleared.
Regardless of the state of the chip-select programming, this bit
will not be set and BERR will not be asserted for an address de-
code conflict occurring during access to a system configuration
register. This is provided to guarantee access to the system con-
figuration registers (BAR and SCR) during initialization.
MC68302 USER’S MANUAL
NOTE
MOTOROLA
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