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H8/3003 Datasheet(PDF) 439 Page - Renesas Technology Corp

Part # H8/3003
Description  microcontroller (MCU)
PDF  715 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3003 Datasheet(HTML) 439 Page - Renesas Technology Corp

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12.4 Interrupts
During interval timer operation, an overflow generates an interval timer interrupt (WOVI). The
interval timer interrupt is requested whenever the OVF bit is set to 1 in TCSR.
12.5 Usage Notes
Contention between TCNT Write and Increment: If a timer counter clock pulse is generated
during the T3 state of a write cycle to TCNT, the write takes priority and the timer count is not
incremented. See figure 12-8.
Figure 12-8 Contention between TCNT Write and Increment
Changing CKS2 to CKS0 Values: Halt TCNT by clearing the TME bit to 0 in TCSR before
changing the values of bits CKS2 to CKS0.
ø
TCNT
TCNT
NM
Counter write data
T3
T2
T1
Write cycle: CPU writes to TCNT
Internal write
signal
TCNT input
clock
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