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R01UH0336EJ0102 Rev.1.02
Page 191 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 4 Interrupt Functions
4.6 Exception Handler Address Switching Function
Interrupt handler addresses can be switched by software.
For details, refer to V850E2M Architecture Manual (R01US0001E).
4.7 Interrupt Response Times
Response times from the generation of an interrupt request until activation of interrupt
servicing are described below.
Figure 4-8
Pipeline Behavior on acknowledgement of an Interrupt Request (Outline)
Interrupt Response Times
Minimum
Maximum
Internal interrupt
7 HEAPCLK
12 HEAPCLK
External interrupt
7H (digital noise
cancellation time + 1HEAPCLK)
12H (digital noise
cancellation time + 1HEAPCKL)
Note 1.
In addition to the times described above, the internal interrupt requires from a
minimum of 1HEAPCLK to a maximum of 3HEAPCLK for the interval between
generation and acknowledgement of the interrupt request.
Note 2.
INT1 to INT7 in the figure indicate interrupt acknowledgement.
Note 3.
The following cases are excluded:
–When successive interrupt non-sample instructions are being executed
–Access to peripheral input/output registers
–When the timing supervision function is in use
Note 4.
For the digital noise cancellation time, refer to Section 2.14, Cancelling Noise on
WB
CPU clock
(HEAPCLK)
Instruction 1
Instruction 2
Interrupt acknowledgement operation
7 CPU-clock cycles
Instruction (first instruction
of the interrupt service routine)
INT2
INT3
INT1
INT4
EX
ID
DF
AT
DP
EX
ID
DP
IF
IF
(Invalid)
EX
ID
(Invalid)
DP
IF
INT5
INT6
INT7
(Invalid)
Interrupt acknowledgement
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