HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 360
HD6417706
Manufacturer Part Number
HD6417706
Description
Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417706.pdf
(709 pages)
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12.3.3
The timer control registers (TCR_0 to TCR_2) control the timer counters (TCNT_0 to TCNT_2)
and interrupts. The TMU has three TCR_0 to TCR_2 registers for each channel.
The TCR_0 to TCR_2R registers are 16-bit read/write registers that control the issuance of
interrupts when the flag indicating timer counter (TCNT_0 to TCNT_2) underflow has been set to
1, and also carry out counter clock selection. When the external clock has been selected, they also
select its edge. Additionally, TCR_2 controls the channel 2 input capture function and the issuance
of interrupts during input capture. The TCR_0 to TCR_2 are initialized to H'0000 by a power-on
reset and manual reset. They are not initialized in standby mode.
In cases of Channel 0 and 1:
Rev. 4.00, 03/04, page 314 of 660
Bit
15 to 9
8
7, 6
5
Timer Control Registers 0 to 2 (TCR_0 to TCR_2)
Bit Name
—
UNF
—
UNIE
Initial Value R/W
All 0
0
All 0
0
R
R/W
R
R/W
These bits are always read as 0. The write value
should always be 0.
Underflow Flag
Status flag that indicates occurrence of a TCNT_0
and TCNT_1 underflow.
0: TCNT has not underflowed.
1: TCNT has underflowed.
Note: * Contents do not change when 1 is written to
These bits are always read as 0. The write value
should always be 0.
Underflow Interrupt Control
Controls enabling of interrupt generation when the
status flag (UNF) indicating TCNT_0 and TCNT_1
underflow has been set to 1.
0: Interrupt due to UNF (TUNI) is not enabled.
1: Interrupt due to UNF (TUNI) is enabled.
Description
Reserved
Reserved
[Clearing condition]
When 0 is written to UNF
[Setting condition]
When TCNT_0 and TCNT_1 underflows*
UNF.
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