HD643303x Hitachi, HD643303x Datasheet - Page 213
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
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Bits 2 to 0—Timer Prescaler 2 to 0 (TPSC2 to TPSC0): These bits select the counter clock
source.
Bit 2
TPSC2
0
1
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 edge or 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 TCR2 are ignored. Phase counting takes precedence.
8.2.11 Timer I/O Control Register (TIOR)
TIOR is an 8-bit register. The ITU has five TIORs, one in each channel.
Channel
0
1
2
3
4
Bit 1
TPSC1
0
1
0
1
Abbreviation
TIOR0
TIOR1
TIOR2
TIOR3
TIOR4
Bit 0
TPSC0
0
1
0
1
0
1
0
1
Function
Internal clock: ø
Internal clock: ø/2
Internal clock: ø/4
Internal clock: ø/8
External clock A: TCLKA input
External clock B: TCLKB input
External clock C: TCLKC input
External clock D: TCLKD input
Function
TIOR controls the general registers. Some functions differ in PWM
mode. TIOR3 and TIOR4 settings are ignored when complementary
PWM mode or reset-synchronized PWM mode is selected in
channels 3 and 4.
198
(Initial value)
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