406
Auto-Reload Count Operation: Figure 12.3 shows the TCNT auto-reload operation.
TCNT value
TCOR
H'00000000
STR0–STR2
UNF
TCOR value set to
TCNT during underflow
Time
Figure 12.3 Auto-Reload Count Operation
TCNT Count Timing:
•
Internal Clock Operation: Set the TPSC2–TPSC0 bits in TCR to select whether peripheral
module clock P
φ
or one of the four internal clocks created by dividing it is used (P
φ
/4, P
φ
/16,
P
φ
/64, P
φ
/256). Figure 12.4 shows the timing.
P
φ
Internal
clock
TCNT
input clock
TCNT
N + 1
N
N – 1
Figure 12.4 Count Timing when Operating on Internal Clock
Содержание SH7709S
Страница 2: ...Hitachi SuperH RISC engine SH7709S Hardware Manual ADE 602 250 Rev 1 0 09 21 01 Hitachi Ltd ...
Страница 75: ...56 ...
Страница 107: ...88 ...
Страница 125: ...106 ...
Страница 139: ...120 ...
Страница 203: ...184 ...
Страница 245: ...226 ...
Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
Страница 323: ...304 Tp TRr TRrw TRrw CKIO CKE CSn RAS3U RAS3L CASU CASL RD WR Figure 10 28 Synchronous DRAM Auto Refresh Timing ...
Страница 411: ...392 ...
Страница 609: ...590 ...
Страница 635: ...616 ...
Страница 663: ...644 ...
Страница 679: ...660 ...