MC68020 Motorola, MC68020 Datasheet - Page 137
MC68020
Manufacturer Part Number
MC68020
Description
(MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
Manufacturer
Motorola
Datasheet
1.MC68020.pdf
(306 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68020CEH16E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68020CEH25
Manufacturer:
XILINX
Quantity:
101
Company:
Part Number:
MC68020CEH25E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68020CFC16E
Manufacturer:
MOT
Quantity:
190
Part Number:
MC68020CFC16E
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Company:
Part Number:
MC68020CFC20E
Manufacturer:
FREESCALE
Quantity:
101
Company:
Part Number:
MC68020CFC25
Manufacturer:
FREESCALE
Quantity:
101
Company:
Part Number:
MC68020EH16E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC68020EH20E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68020FC16E
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
- Current page: 137 of 306
- Download datasheet (2Mb)
Priority level 7, the nonmaskable interrupt, is a special case. Level 7 interrupts cannot be
masked by the interrupt priority mask, and they are transition sensitive. The processor
recognizes an interrupt request each time the external interrupt request level changes
from some lower level to level 7, regardless of the value in the mask. Figure 6-3 shows
two examples of interrupt recognitions, one for level 6 and one for level 7. When the
MC68020/EC020 processes a level 6 interrupt, the interrupt priority mask is automatically
updated with a value of 6 before entering the handler routine so that subsequent level 6
interrupts are masked. Provided no instruction that lowers the mask value is executed, the
6-12
*
A—Asserted
N—Negated
Indicates that no interrupt is requested.
Interrupt Level
Requested
*
0
1
2
3
4
5
6
7
IPEND is not implemented in the MC68EC020.
*
Table 6-3. Interrupt Levels and Mask Values
OTHERWISE
Figure 6-2. Interrupt Pending Procedure
IPL2
N
N
N
N
A
A
A
A
Control Line Status
M68020 USER’S MANUAL
OR TRANSITION ON LEVEL 7
(MC68020 ASSERTS IPEND )
INTERRUPT LEVEL
SAMPLE AND SYNCH
INTERRUPT PENDING
IPL1
N
N
A
A
N
N
A
A
IPL2–IPL0
RESET
WITH STATUS REGISTER MASK)
(COMPARE INTERRUPT LEVEL
IPL0
N
A
N
A
N
A
N
A
I2–I0,
*
Required for Recognition
Interrupt Mask Value
N/A
1–0
2–0
3–0
4–0
5–0
7–0
0
*
MOTOROLA
Related parts for MC68020
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
3N2046367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MOTOROLA POWERPC 603e MICROPROCESSOR
Manufacturer:
Motorola
Part Number:
Description:
Motorola Semiconductor Datasheet Library
Manufacturer:
Motorola
Part Number:
Description:
SWITCHMODE Schottky Power Rectifier(POWERTAP III Package)
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
SWITCHMODE Schottky Power Rectifirer
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Search -----> MTE53N50E
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
SCHOTTKY BARRIER RECTIFIER 200 AMPERES 60 VOLT
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
NPN SILICON POWER DARLINGTON TRANSISTOR
Manufacturer:
Motorola
Datasheet: