SH7764 Datasheet, PDF (539/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

(2) Auto-Reload Count Operation
Figure 14.3 shows the TCNT auto-reload operation.
Section 14 Timer Unit (TMU)
TCNT value
TCOR
TCOR value set in TCNT
on underflow
H'0000 0000
STR0 to STR5
Time
UNF
Figure 14.3 TCNT Auto-Reload Operation
(3) TCNT Count Timing
• Operating on internal clock
Any of five count clocks (Pck/4, Pck/16, Pck/64, Pck/256, or Pck/1024) scaled from the
peripheral clock can be selected as the count clock by means of the TPSC[2:0] bits in TCR.
Figure 14.4 shows the timing in this case.
Pck
Internal clock
TCNT
N+1
N
N–1
Figure 14.4 Count Timing when Operating on Internal Clock
Rev. 1.00 Nov. 22, 2007 Page 483 of 1692
REJ09B0360-0100