HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 372
HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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11.
11.7.10 Contention between Buffer Register Write and Input Capture
If an input capture signal is generated in the T2 state of a buffer register write cycle, the buffer
operation takes precedence and the write to the buffer register is not performed.
Figure 11.78 shows the timing in this case.
11.7.11 TCNT2 Write and Overflow/Underflow Contention in Cascade Connection
With timer counters TCNT1 and TCNT2 in a cascade connection, when a contention occurs
during TCNT_1 count (during a TCNT_2 overflow/underflow) in the T
write cycle, the write to TCNT_2 is conducted, and the TCNT_1 count signal is disabled. At this
point, if there is match with TGRA_1 and the TCNT_1 value, a compare signal is issued.
Furthermore, when the TCNT_1 count clock is selected as the input capture source of channel 0,
TGRA_0 to D_0 carry out the input capture operation. In addition, when the compare match/input
capture is selected as the input capture source of TGRB_1, TGRB_1 carries out input capture
operation. The timing is shown in figure 11.79.
For cascade connections, be sure to synchronize settings for channels 1 and 2 when setting TCNT
clearing.
Rev.4.00 Mar. 27, 2008 Page 328 of 882
REJ09B0108-0400
Multi-Function Timer Pulse Unit (MTU)
Figure 11.78
Pφ
Address
Write signal
Input capture
signal
TCNT
TGR
Buffer register
Contention between Buffer Register Write and Input Capture
Buffer register write cycle
M
Buffer register
T1
address
N
T2
M
N
2
state of the TCNT_2
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