R5F363AENFA#U0 Renesas Electronics America, R5F363AENFA#U0 Datasheet - Page 833

• Manufacturer Part Number: R5F363AENFA#U0
• Description: MCU 4KB FLASH 256/16K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: M16C/60/63r

Specifications of R5F363AENFA#U0

• Core Processor: M16C/60
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, I²C, SIO, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 26x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M16C/63 Group
REJ09B0510-0100 Rev.1.00 Sep 15, 2009
Page 795 of 836
32.6.2
Figure 32.4
Figure 32.5
32.6.2.1
32.6.2.2
Reason:
If noise enters the clock I/O pin, the clock waveform becomes unstable, which causes an error in
operation or a program runaway. Also, if a potential difference attributed to the noise occurs between
the VSS level of the MCU and the VSS level of the oscillator, an accurate clock is not input to the
MCU.
For large currents that exceed the MCU's current range, wire the signal lines as far away from the
MCU as possible (especially the oscillator).
Reason:
In the system using the MCU, there are signal lines for controlling motors, LEDs, and thermal heads.
When a large current flows through these signal lines, noise is generated due to mutual inductance.
•
•
Connect the shortest possible wiring to the clock I/O pin.
Connect (a) the capacitor's ground lead connected to the oscillator, and (b) the MCU's VSS pin,
with the shortest possible wiring (maximum 20 mm).
Noise Countermeasure
Clock I/O Pin Wiring
Clock I/O Pin Wiring
Large Current Signal Line
Large Current Signal Line Wiring
Noise
Mutual inductance
Large current
Bad
XIN
VSS
XOUT
M
GND
XIN
VSS
XOUT
MCU
Good
XOUT
XIN
VSS
32. Usage Notes