M30622SAFP#U5 Renesas Electronics America, M30622SAFP#U5 Datasheet - Page 608

• Manufacturer Part Number: M30622SAFP#U5
• Description: IC M16C MPU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/60r

Specifications of M30622SAFP#U5

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 50
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• For Use With: 867-1000 - KIT QUICK START RENESAS 62PM3062PT3-CPE-3 - EMULATOR COMPACT M16C/62P/30P
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Appendix 5
Appendix 5 Countermeasures against noise
1.1 Shortest wiring length
Countermeasures against noise are described below. The following countermeasures are generally effec-
tive as countermeasures against noise, however, it is necessary not only to take measures as follows but to
evaluate before actual use.
Figure 1.1.1. Selection of packages
Figure 1.1.2. Wiring for RESET pin
The wiring on a printed circuit board can function as an antenna which feeds noise into the microcomputer.
The shorter the total wiring length (by mm unit), the less the possibility of noise insertion into a microcom-
puter.
1.1.1 Package
1.1.2 Wiring for RESET pin
Select the smallest possible package to make the total wiring length short.
The wiring length depends on a microcomputer package. Use of a small package, for example QFP and
not DIP, makes the total wiring length short to reduce influence of noise.
Make the length of wiring which is connected to the RESET pin as short as possible. Especially, connect
a capacitor across the RESET pin and the V
20mm).
The width of a pulse input into the RESET pin is determined by the timing necessary conditions. If noise
having a shorter pulse width than the standard is input to the RESET pin, the reset is released before the
internal state of the microcomputer is completely initialized. This may cause a program runaway.
Reason
Reason
Reset
circuit
V
SS
____________
N.G.
Noise
____________
__________
DIP
RESET
V
SS
____________
SDIP
SS
pin or reset IC with the shortest possible wiring (within
____________
SOP
____________
QFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Reset
circuit
O.K.
V
SS
RESET
V
SS
M16C / 62A Group
Mitsubishi microcomputers
2-289