HD643303x Hitachi, HD643303x Datasheet - Page 228

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

•
ø
Internal
clock
TCNT input
TCNT
Count timing
— Internal clock source
GR
H'0000
STR bit
IMF
Bits TPSC2 to TPSC0 in TCR select the system clock (ø) or one of three internal clock
sources obtained by prescaling the system clock (ø/2, ø/4, ø/8).
Figure 8-17 shows the timing.
TCNT value
N – 1
Figure 8-17 Count Timing for Internal Clock Sources
Figure 8-16 Periodic Counter Operation
213
N
Counter cleared by general
register compare match
N + 1
Time