8.2.4
Timer Interrupt Enable Register (TIER)
Bit
7
ICIAE
0
6
ICIBE
0
5
ICICE
0
4
ICIDE
0
3
OCIAE
0
2
OCIBE
0
1
OVIE
0
0
—
1
Initial value
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
TIER is an 8-bit readable/writable register that enables and disables interrupts.
TIER is initialized to H'01 by a reset and in the standby modes.
Bit 7—Input Capture Interrupt A Enable (ICIAE): This bit selects whether to request input
capture interrupt A (ICIA) when input capture flag A (ICFA) in the timer status/control register
(TCSR) is set to 1.
Bit 7: ICIAE
Description
0
1
Input capture interrupt request A (ICIA) is disabled.
Input capture interrupt request A (ICIA) is enabled.
(Initial value)
Bit 6—Input Capture Interrupt B Enable (ICIBE): This bit selects whether to request input
capture interrupt B (ICIB) when input capture flag B (ICFB) in TCSR is set to 1.
Bit 6: ICIBE
Description
0
1
Input capture interrupt request B (ICIB) is disabled.
Input capture interrupt request B (ICIB) is enabled.
(Initial value)
Bit 5—Input Capture Interrupt C Enable (ICICE): This bit selects whether to request input
capture interrupt C (ICIC) when input capture flag C (ICFC) in TCSR is set to 1.
Bit 5: ICICE
Description
0
1
Input capture interrupt request C (ICIC) is disabled.
Input capture interrupt request C (ICIC) is enabled.
(Initial value)
Bit 4—Input Capture Interrupt D Enable (ICIDE): This bit selects whether to request input
capture interrupt D (ICID) when input capture flag D (ICFD) in TCSR is set to 1.
Bit 4: ICIDE
Description
0
1
Input capture interrupt request D (ICID) is disabled.
Input capture interrupt request D (ICID) is enabled.
(Initial value)
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