Renesas SH7641 Manuel D’Utilisation

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Section 18   Multi-Function Timer Pulse Unit (MTU) 
 
 
Rev. 4.00  Sep. 14, 2005  Page 571 of 982 
 
 REJ09B0023-0400 
18.4.3 Buffer 
Operation 
Buffer operation, provided for channels 0, 3, and 4, enables TGRC and TGRD to be used as buffer 
registers. 
Buffer operation differs depending on whether TGR has been designated as an input capture 
register or as a compare match register. 
Table 18.29 shows the register combinations used in buffer operation. 
Table 18.29  Register Combinations in Buffer Operation 
Channel 
Timer General Register Buffer 
Register 
0 TGRA_0 
TGRC_0 
 TGRB_0 
TGRD_0 
3 TGRA_3 
TGRC_3 
 TGRB_3 
TGRD_3 
4 TGRA_4 
TGRC_4 
 TGRB_4 
TGRD_4 
 
•  When TGR is an output compare register 
When a compare match occurs, the value in the buffer register for the corresponding channel is 
transferred to the timer general register. 
This operation is illustrated in figure 18.13. 
Buffer
register
Timer general
register
TCNT
Comparator
Compare match signal
 
Figure 18.13   Compare Match Buffer Operation