SH7055S Datasheet, PDF (392/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

TIOR2D). When used as output compare registers, a compare-match can be used as a one-shot
pulse terminate trigger by setting the channel 8 one-shot pulse terminate register (OTR), and using
this in combination with the down-counters (DCNT8I to DCNT8P).
In the case of the output compare registers (OCR2A to OCR2H), a TCNT2B compare-match can
be used as a one-shot pulse start trigger by setting the channel 8 timer connection register (TCNR),
and using this in combination with the down-counters (DCNT8I to DCNT8P). An interrupt can be
requested on the occurrence of the respective input capture or compare-match.
In addition, channel 2 has a 16-bit dedicated input capture register (OSBR2). The channel 0 TI0A
input pin can also be used as the OSBR2 trigger input, enabling use of a twin-capture function.
Channels 3 to 5: Channels 3 to 5 each have a 16-bit free-running counter (TCNT3 to TCNT5) and
four 16-bit general registers (GR3A to GR3D, GR4A to GR4D, GR5A to GR5D). TCNT3 to
TCNT5 are up-counters that perform free-running operation. Channels 3 to 5 each have a 16-bit
free-running counter (TCNT3 to TCNT5) and four 16-bit general registers (GR3A to GR3D,
GR4A to GR4D, GR5A to GR5D). TCNT3 to TCNT5 are up-counters that perform free-running
operation. In addition, counter clearing can be performed by compare-match by making a setting
in the timer I/O control register (TIOR3A, TIOR3B, TIOR4A, TIOR4B, TIOR5A, TIOR5B).
Each counter can generate an interrupt request when it overflows.
The four general registers (GR3A to GR3D, GR4A to GR4D, GR5A to GR5D) each have
corresponding external signal I/O pins (TIO3A to TIO3D, TIO4A to TIO4D, TIO5A to TIO5D),
and can be used as input capture or output compare registers. When used for input capture, the
free-running counter (TCNT3 to TCNT5) value is captured by means of input from the
corresponding external signal I/O pin (TIO3A to TIO3D, TIO4A to TIO4D, TIO5A to TIO5D).
Rising edge, falling edge, or both edges can be selected for the input capture signal in the timer
I/O control registers (TIOR3A, TIOR3B, TIOR4A, TIOR4B, TIOR5A, TIOR5B). Also, in use for
input capture, input capture can be performed using a compare-match between a channel 9 event
counter (ECNT9A to ECNT9D), described later, and a general register (GR9A to GR9D) as the
trigger (channel 3 only). In this case, capture is performed even if an input capture disable setting
has been made for TIOR3A to TIOR3D. When used for output compare, compare-match with the
free-running counter (TCNT3 to TCNT5) is performed. For the output from the external signal I/O
pins by compare-match, 0 output, 1 output, or toggle output can be selected in the timer I/O
control registers (TIOR3A, TIOR3B, TIOR4A, TIOR4B, TIOR5A, TIOR5B). An interrupt can be
requested on the occurrence of the respective input capture or compare-match. However, in the
case of input capture using channel 9 as a trigger, an interrupt request from channel 3 cannot be
used.
By selecting PWM mode in the timer mode register (TMDR), PWM output can be obtained, with
three outputs for each. In this case, GR3D, GR4D, and GR5D are automatically used as cycle
registers, and GR3A to GR3C, GR4A to GR4C, GR5A to GR5C, as duty registers. TCNT3 to
TCNT5 are cleared by the corresponding GR3D, GR4D, or GR5D compare-match.
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