DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 657

• 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

19.6
19.6.1
supply a clock to the subclock divider, connect a 32.768-kHz crystal resonator, as shown in figure
19.6. Figure 19.7 shows the equivalence circuit for a 32.768-kHz oscillator.
19.6.2
If no subclock is required, connect the OSC1 pin to Vss and leave OSC2 open, as shown in figure
19.8. Set the SUBSTP bit of LPWRCR to 1. If this setting is not made, transition to power-down
mode may not complete properly in some cases.
Subclock Oscillator
Connecting 32.768-kHz Crystal Resonator
Handling Pins when Subclock Not Required
OSC1
Figure 19.6 Example Connection of 32.768-kHz Quartz Oscillator
Figure 19.7 Equivalence Circuit for 32.768-kHz Oscillator
Figure 19.8 Pin Handling when Subclock Not Required
Note: C
OSC1
OSC2
Ls
capacitance of the board.
1
and C
OSC1
OSC2
Cs
2
are reference values including the floating
Co
C
C
1
2
Rs
C
Co = 1.5 pF (typ.)
Rs = 14 kΩ (typ.)
fw = 32.768 kHz
Type name = C001R (SEIKO EPSON)
1
Rev.7.00 Dec. 24, 2008 Page 603 of 698
= C
Open state
2
= 15 pF (typ.)
OSC2
REJ09B0074-0700