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SH7021 Datasheet(PDF) 305 Page - Renesas Technology Corp

Part # SH7021
Description  SuperH??RISC engine
PDF  509 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7021 Datasheet(HTML) 305 Page - Renesas Technology Corp

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RENESAS 289
10.6.5
Contention between TCNT Write and Overflow/Underflow
If an overflow occurs in the T3 state of a TCNT write cycle, writing takes priority over counter
incrementing. The OVF is set to 1. The same applies to underflows. This timing is shown in figure
10.62.
T1
T2
T3
TCNT write cycle
TCNT address
H'FFFF
M
TCNT write data
CK
Address
Internal
write signal
TCNT
input clock
Overflow
signal
TCNT
OVF
Figure 10.62 Contention between TCNT Write and Overflow



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