HD64F7051SFJ20V Datasheet, PDF (243/843 Pages) Renesas Technology Corp – Hardware Manual Renesas 32-Bit RISC

Section 10 Advanced Timer Unit (ATU)
10.2.4 Timer Control Registers (TCR)
The timer control registers (TCR) are 8-bit registers. The ATU has ten TCR registers. one for each
channel.
Channel Abbreviation Function
1
TCR1
Internal clock/external clock selection
2
TCR2
When internal clock is selected: Further scaling of clock φ' scaled
3
TCR3
with PSCR1, to create φ"
4
TCR4
When external clock is selected: Selection of 2 external clocks,
selection of input edge
5
TCR5
6
TCR6
Further scaling of clock φ' scaled with PSCR1, to create φ"
7
TCR7
(internal clock only)
8
TCR8
9
TCR9
10
TCR10
Further scaling of clock φ' scaled with PSCR1, to create φ"
(internal clock only)
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.
When an internal clock is selected, TCR selects the value of φ" further scaled from clock φ' scaled
with prescaler register 1 (PSCR1). Scaled clock φ" can be selected, for channels 1 to 10 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 (channels 1 to 5 only), TCR selects whether TCLKA or
TCLKB 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.
Rev. 5.00 Jan 06, 2006 page 221 of 818
REJ09B0273-0500