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89
3.9 Gear Function
Figure 3.9-2 Clock Selection Timing Chart
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Blocks That Use the Peripheral Clock
The blocks listed below use the peripheral clock, which can be set by the gear function, as the
operating clock.
Calculate the operation time based on the frequency division ratio set to bits PCK0 and PCK1 of
the GCR register of the clock generator.
• Clock generator
• Interrupt controller
• Ports D to F
• U-TIMER (channels 0, 1, 2)
• UART (channels 0, 1, 2)
• A/D converter
• 16-bit reload timer (channels 0, 1, 2)
• External interrupt
• NMI controller
• Delayed interrupt module
• PWM timer
CPU clock (a)
CPU clock (b)
CHC
CCK value
01 00
PCK value
00
Peripheral clock (a)
Peripheral clock (b)
Source clock