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參數(shù)資料
| 型號(hào)： | S3P1860-DK |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP20 |
| 封裝： | 0.300 INCH, DIP-20 |
| 文件頁(yè)數(shù)： | 64/95頁(yè) |
| 文件大?。?/td> | 339K |
| 代理商： | S3P1860-DK |
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REMOTE CONTROL TX. APPLICATION NOTE
S3C1840/C1850/C1860/P1860
7-10
PROGRAMMING GUIDELINES
When programming S3C1840/C1850/C1860 microcontroller, please follow the guidelines presented in this
subsection.
PCB Artwork
For remote control applications, turning the I.R.LED on and off may cause variations in transmission current
ranging from a few hundred
A to a few hundred mA. This current variation generates overshoot and undershoot
noise on the power line, causing a system malfunction.
Remocon
Signal
VDD
To reduce noise and to stabilize the chip's operation, we recommend that the application designer reduce
overshooting of the I.R.LED drive current and design PCB for the remote controller as follows: (The noise level
should be limited to around 0.5 V
P-P, where VP-P is the peak-to-peak voltage)
— Oscillation circuit should be located as near as possible to the chip.
— PCB pattern for V
DD/VSS should be as wide and short as possible.
— I.R.LED drive TR and I.R.LED should be located as far as possible from the chip.
— Power supply battery and power capacitor should be located as near as possible to the chip.
— The ground pattern of the TEST pin (Ground of I.R.LED drive TR) and V
SS pin should be separated and
connected directly with the battery terminal.
— The ceramic capacitor (0.1uF or 0.01uF) and power capacitor(over 47uF) is recommended to use noise filter.
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| S3C1860XX-SK | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20 |
| S3C1860XX-DK | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDIP20 |
| S3P7048-QZ | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP42 |
| S3P72B9-QA | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP128 |
| S3C72B5XX-QA | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP128 |
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