HD6413003TF10 Datasheet, PDF (536/717 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

17.4.3 Selection of Waiting Time for Exit from Software Standby Mode
Bits STS2 to STS0 in SYSCR should be set as follows.
Crystal Resonator: Set STS2 to STS0 so that the waiting time (for the clock to stabilize) is at
least 8 ms. Table 17-3 indicates the waiting times that are selected by STS2 to STS0 settings at
various system clock frequencies.
External Clock: Any value may be set in the clock-halving version. Normally the minimum value
(STS2 = STS1 = STS0 = 1) is recommended. In the 1:1 clock version, any value other than the
minimum value may be set.
Table 17-3 Clock Frequency and Waiting Time for Clock to Settle
Waiting
STS2 STS1 STS0 Time 16 MHZ 12 MHz 10 MHz 8 MHz 6 MHz 4 MHz 2 MHz Unit
0 0 0 8192 0.51 0.65 0.8 1.0 1.3 2.0 4.1 ms
states
0 0 1 16384 1.0 1.3 1.6 2.0 2.7 4.1 8.2
states
0 1 0 32768 2.0 2.7 3.3 4.1 5.5 8.2 16.4
states
0 1 1 65536 4.1 5.5 6.6 8.2 10.9 16.4 32.8
states
1 0 — 131072 8.2 10.9 13.1 16.4 21.8 32.8 65.5
states
1 1 — 4 states* 0.25 0.33 0.4 0.5 0.67 1.0 2.0 µs
: Recommended setting
Note: * This setting cannot be used in the 1:1 clock version.
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