gc80c521a CORERIVER Semiconductor, gc80c521a Datasheet - Page 95

• Manufacturer Part Number: gc80c521a
• Description: Flash / Isp / Iap 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

7. Strong Point I : Noise Reduction
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* This experimental results can vary according to design style of an application system.
MiDAS1.0B can reduce EMI by removing the needless swing of ALE signal.
You can enable/disable ALE signal by changing the value of ALEOFF bit (SFR PMR.2).
Or can reduce system cost by removing needless decoupling capacitors while maintaining the EMI.
System Clock
11.0592
22.1184
[MHz]
6
Ground
Ground
Ground
Power
Power
Power
Noise
ALE “ON”
410 mV
550 mV
464 mV
476 mV
360 mV
500 mV
PP
PP
PP
PP
PP
PP
MiDAS1.0B
170 mV
330 mV
128 mV
280 mV
170 mV
330 mV
ALE “OFF”
(Cont’d)
PP
PP
PP
PP
PP
PP
MiDAS1.0B Family
ALE always “ON”
Company A’s
360 mV
500 mV
432 mV
640 mV
380 mV
480 mV
80C52
PP
PP
PP
PP
PP
PP
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