Renesas MCU M16C Family (R32C/M32C/M16C/R8C) - Glyn

Concepts
90.00 >
85.00
80.00
75.00 dBuV
70.00
65.00
60.00 >
Low EMI/Excellent EMS
The M16C Family is designed to maximize EMI/EMS performance. This reduces costs associated with
EMI/EMS countermeasures for application developers.
Low Electromagnetic Interference (EMI)
The M16C Family is designed to
minimize switching noise. Noise
output is reduced by as much as
20dB.
EM Scan
Measurement method:
EM scan measurement using
electromagnetic field probe
Measurement conditions:
Measurement frequency range
40 to 120MHz
Measuring device: EPS-M1 EM scanner, Noise Laboratory Co., Ltd.
Measurement location: Kansai Electronic Industry Development Center
Measurement frequency range: 30 to 110MHz
Measurement unit: 2mm 2
Power supply: 5 V
Company
M16C/62P Clock: 24MHz (PLL) A RISC-A
Excellent Ability to Withstand Noise (EMS)
All M16C/M32C MCUs are
designed using various noise
reduction techniques. These
MCUs are extensively tested
using different noise test
methods.
The Vcc and Vss pins are
arranged close together on
M16C MCUs to prevent noise
from entering via the Vcc and
ground wiring. Internal parasitic
capacitors provide further
protection against noise at the
Vcc and Vss pins. This design
also helps suppress unwanted
noise emission from the chip
itself.
AC 100V
Short Distance between Vcc and Vss
Vcc
GND
3kV
100V
Note noise peaks!
5V
0V
Vcc
GND
(M16C)
Power supply: 5 V
Clock: 20MHz (PLL)
Note: Evaluation is also performed using the VDE and TEM cell methods. Only products that meet uniform standards are produced in volume.
Evaluation Method
Noise
Source
Noise Tester
(Spike Noise Generator)
(Conventional)
Noise Propagation
into Chip
5 V Regulator
3-Element Regulator
Noise
Source
Mounting of Decoupling
Capacitor in Optimal Location
1.5kV
EMI/EMS
Evaluation Board
Absorbed as
Common Mode
Noise
Parasitic Capacitor
Line Inductance
12