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參數(shù)資料
| 型號(hào)： | UPD17215CT |
| 廠商： | NEC Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 33/84頁 |
| 文件大?。?/td> | 350K |
| 代理商： | UPD17215CT |
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μ
PD17215, 17216, 17217, 17218
33
When bit 7 of NRZLTMM is 0 (carrier not output)
3
2
1
0
0
0
0
NRZ
Address
RF : 12H
NRZ
On reset
0H
R/W
R/W
0
1
NRZ Data
Outputs low level to REM pin
Outputs a carrier to REM pin or high level output
3
2
1
0
0
0
0
NRZBF
Address
RF : 11H
NRZBF
On reset
0H
R/W
R/W
0
1
NRZ Data Output Next
NRZ buffer bit. Transfered to NRZ by interrupt
signal for 8-bit timer.
NRZ
REM
Setting carrier frequency and duty factor
Where the system clock frequency is f
X
and carrier frequency is f
C
:
l
(division ratio) = f
X
/(2
×
f
C
)
l
is divided into m:n and is set in the modulo registers as follows:
High-level period set value = {
l
×
m/(m + n)} - 1
Low-level period set value = {
l
×
n/(m + n)} - 1
Example:
Where f
c
= 38 kHz, duty factor (high-level period) = 1/3, and f
x
= 4 MHz,
l
= 4 MHz/(2 x 38 kHz) = 52.6
m:n = 1:2
From the above, the value of the modulo register is:
High-level period ·
Low-level period ·
Therefore, the carrier frequency is 37.74 kHz.
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| UPD17218CT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17218GT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17215GT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17215GT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17216 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17216CT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17216GT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17217 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
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