H8SSLASH2218 datasheet(370/750 Pages) RENESAS

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Section 9 16-Bit Timer Pulse Unit (TPU)

Rev.6.00 Jun. 03, 2008 Page 322 of 698

REJ09B0074-0600

9.6

Interrupts

9.6.1

Interrupt Source and Priority

There are three kinds of TPU interrupt source: TGR input capture/compare match, TCNT

overflow, and TCNT underflow. Each interrupt source has its own status flag and enable/disabled

bit, allowing generation of interrupt request signals to be enabled or disabled individually. When

an interrupt request is generated, the corresponding status flag in TSR is set to 1. If the

corresponding enable/disable bit in TIER is set to 1 at this time, an interrupt is requested. The

interrupt request is cleared by clearing the status flag to 0. Relative channel priorities can be

changed by the interrupt controller, but the priority order within a channel is fixed. For details, see

section 5, Interrupt Controller. Table 9.24 lists the TPU interrupt sources.

Table 9.24

TPU Interrupts

Channel Name

Interrupt Source

Interrupt Flag

DMAC Activation

Priority*

TGI0A

TGRA_0 input

capture/compare match

TGFA

Possible

High

TGI0B

TGRB_0 input

capture/compare match

TGFB

Not possible

TGI0C

TGRC_0 input

capture/compare match

TGFC

Not possible

TGI0D

TGRD_0 input

capture/compare match

TGFD

Not possible

TCI0V

TCNT_0 overflow

TCFV

Not possible

TGI1A

TGRA_1 input

capture/compare match

TGFA

Possible

TGI1B

TGRB_1 input

capture/compare match

TGFB

Not possible

TCI1V

TCNT_1 overflow

TCFV

Not possible

TCI1U

TCNT_1 underflow

TCFU

Not possible

TGI2A

TGRA_2 input

capture/compare match

TGFA

Possible

TGI2B

TGRB_2 input

capture/compare match

TGFB

Not possible

TCI2V

TCNT_2 overflow

TCFV

Not possible

TCI2U

TCNT_2 underflow

TCFU

Not possible

Low

Note: * This table shows the initial state immediately after a reset. The relative channel priorities

can be changed by the interrupt controller.

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