SH7055S Datasheet, PDF (266/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

11.2.3 Timer Control Registers (TCR)
The timer control registers (TCR) are 8-bit registers. The ATU-II has 16 TCR registers: two each
for channels 1 and 2, one each for channels 3, 4, 5, 8, and 11, two each for channels 6 and 7, and
three for channel 9. For details of channel 10, see section 11.2.26, Channel 10 Registers.
Channel
1
2
3
4
5
6
7
8
9
11
Abbreviation
TCR1A, TCR1B
TCR2A, TCR2B
TCR3
TCR4
TCR5
TCR6A, TCR6B
TCR7A, TCR7B
TCR8
TCR9A, TCR9B,
TCR9C
TCR11
Function
Internal clock/external clock/TI10 input clock selection
Internal clock selection
External clock selection/setting of channel 3 trigger in event of
compare-match
Internal clock/external clock selection
Each TCR is an 8-bit readable/writable register that selects whether an internal clock or external
clock is used for channels 1 to 5 and 11. For channels 6 to 8, TCR selects an internal clock, and
for channel 9, an external clock.
When an internal clock is selected, TCR selects the value of φ" further scaled from clock φ' scaled
with prescaler register (PSCR). Scaled clock φ" can be selected, for channels 1 to 8 and 11 only,
from φ', φ'/2, φ'/4, φ'/8, φ'/16, and φ'/32 (only φ' is available for channel 0). Edge detection is
performed on the rising edge.
When an external clock is selected, TCR selects whether TCLKA, TCLKB (channels 1 to 5 and
11 only), TI10 pin input (channels 1 to 5 only), or a TI10 pin input multiplied clock (channels 1 to
5 only) is used, and also performs edge selection.
Each TCR is initialized to H'00 by a power-on reset, and in hardware standby mode and software
standby mode.
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