HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 414

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

11. Realtime Clock (RTC)
Rev.4.00 Oct. 10, 2008 Page 314 of 1122
REJ09B0370-0400
Notes: 1. Select either the C
Noise filter
2. Built-in resistance value R
3. C
4. The crystal oscillation stabilization time depends on the mounted circuit constants, floating
5. Place the crystal resonator and load capacitors C
6. Ensure that the crystal resonator connection pin (EXTAL2 and XTAL2) wiring is routed as far away
7. Insert a noise filter in the RTC power supply.
requirements such as the adjustment range, degree of stability, etc.
earth board.
capacitance, etc., and should be decided after consultation with the crystal resonator
manufacturer.
XTAL2 pins.)
as possible from other power lines (except GND) and signal lines.
(Correct oscillation may not be possible if there is externally induced noise in the EXTAL2 and
in
R
and C
RTC
Figure 11.5 Example of Crystal Oscillation Circuit Connection
VDD-RTC
3.3 V
out
values include floating capacitance due to the wiring. Take care when using a solid-
C
RTC
in
or C
out
f
(typ. value) = 10 MΩ, R
side for the frequency adjustment variable capacitor according to
VSS-RTC
This LSI
in
D
and C
(typ. value) = 400 kΩ
EXTAL2
C
in
out
as close as possible to the chip.
R
f
XTAL
XTAL2
R
D
C
out