SH7763 Datasheet, PDF (767/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

(2) Auto-Reload Count Operation
Figure 19.3 shows the TCNT auto-reload operation.
Section 19 Timer Unit (TMU)
TCNT value
TCOR
TCOR value set in TCNT
on underflow
H'0000 0000
STR0 to STR5
Time
UNF
Figure 19.3 TCNT Auto-Reload Operation
(3) TCNT Count Timing
• Operating on internal clock
Any of five count clocks (Pck0/4, Pck0/16, Pck0/64, Pck0/256, or Pck0/1024) scaled from the
peripheral clock can be selected as the count clock by means of the TPSC2 to TPSC0 bits in
TCR.
Figure 19.4 shows the timing in this case.
Pck
Internal clock
TCNT
N+1
N
N–1
Figure 19.4 Count Timing when Operating on Internal Clock
Rev. 1.00 Oct. 01, 2007 Page 701 of 1956
REJ09B0256-0100