DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 674

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

20.4.3
Bits STS2 to STS0 in SBYCR should be set as described below.
• Using a Crystal Oscillator:
• Using an External Clock
Table 20.3 Oscillation Stabilization Time Settings
STS2 STS1 STS0 Standby Time
0
1
20.4.4
Figure 20.4 shows an example in which a transition is made to software standby mode at the
falling edge on the NMI pin, and software standby mode is cleared at the rising edge on the NMI
pin.
In this example, an NMI interrupt is accepted with the NMIEG bit in SYSCR cleared to 0 (falling
edge specification), then the NMIEG bit is set to 1 (rising edge specification), the SSBY bit is set
to 1, and a SLEEP instruction is executed, causing a transition to software standby mode.
Software standby mode is then cleared at the rising edge on the NMI pin.
Rev.7.00 Dec. 24, 2008 Page 620 of 698
REJ09B0074-0700
Set bits STS2 to STS0 so that the standby time is at least t
time).
Table 20.3 shows the standby times for different operating frequencies and settings of bits
STS2 to STS0.
Set bits STS2 to STS0 as any value. Usually, minimum value is recommended. A standby time
of 100 μs or longer (flash memory power supply stabilization time) should be used in the F-
ZTAT version.
0
1
0
1
: Recommended time setting (For conditions, see t
Setting Oscillation Stabilization Time after Clearing Software Standby Mode
Software Standby Mode Application Example
0
1
0
1
0
1
0
1
8192 states
16384 states
32768 states
65536 states
131072 states
262144 states
2048 states
16 states
24MHz 20MHz 16MHz 13MHz 10MHz 8MHz
0.34
0.68
1.4
2.7
5.5
10.9
0.09
0.67
0.41
0.82
1.6
3.3
6.6
13.1
0.10
0.80
0.51
1.0
2.0
4.1
8.2
16.4
0.13
1.0
0.63
1.3
2.5
5.0
10.1
20.2
0.16
1.2
OSC2
0.82
1.6
3.3
6.6
13.1
26.2
0.20
1.6
in table 22.4.)
OSC2
1.0
2.0
4.1
8.2
16.4
32.8
0.26
2.0
ms (the oscillation stabilization
6MHz
1.4
2.7
5.5
10.9
21.8
43.7
0.34
2.7
4MHz
2.0
4.1
8.2
16.4
32.8
65.5
0.51
4.0
2MHz
4.1
8.2
16.4
32.8
65.5
131.1
1.0
8.0
Unit
ms
µs