3069RF-ZTAT Datasheet, PDF (357/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

When bit TPSC2 is cleared to 0 an internal clock source is selected, and the timer counts only
falling edges. When bit TPSC2 is set to 1 an external clock source is selected, and the timer counts
the edges selected by bits CKEG1 and CKEG0.
When channel 2 is set to phase counting mode (MDF = 1 in TMDR), the settings of bits TPSC2 to
TPSC0 in 16TCR2 are ignored. Phase counting takes precedence.
9.2.10 Timer I/O Control Register (TIOR)
TIOR is an 8-bit register. The 16-bit timer has three TIORs, one in each channel.
Channel Abbreviation Function
0
TIOR0
TIOR controls the general registers. Some functions differ in PWM
1
TIOR1
mode.
2
TIOR2
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
—
IOB2 IOB1 IOB0
—
IOA2 IOA1 IOA0
1
0
0
0
1
0
0
0
—
R/W R/W R/W
—
R/W
R/W
R/W
I/O control A2 to A0
These bits select GRA
functions
Reserved bit
I/O control B2 to B0
These bits select GRB functions
Reserved bit
Each TIOR is an 8-bit readable/writable register that selects the output compare or input capture
function for GRA and GRB, and specifies the functions of the TIORA and TIORB pins. If the
output compare function is selected, TIOR also selects the type of output. If input capture is
selected, TIOR also selects the edges of the input capture signal.
TIOR is initialized to H'88 by a reset and in standby mode.
Bit 7—Reserved: This bit cannot be modified and is always read as 1.
Rev. 5.0, 09/04, page 335 of 978