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參數(shù)資料
| 型號： | TMS3637DR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 搖控器 |
| 英文描述： | INFRARED, TRANSMITTER/RECEIVER IC, PDSO8 |
| 封裝： | PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 13/54頁 |
| 文件大?。?/td> | 384K |
| 代理商： | TMS3637DR |
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5–3
8.
After a minimum valid time of tv = 10 s, apply the high-voltage programming pulse to
permanently store the 31 code bits in EEPROM memory as shown in Figure 5–2. As stated in
steps 4 and 5, exactly 4 reset and 31 clock pulses must be applied for the device to successfully
program. The device does not transfer the code from its registers into the EEPROM if less than
or greater than 4 reset and 31 clock pulses are used before the programming pulse is applied.
15 V
OSCC
OSCR
(clock in)
VCC
IN
(data in)
OSCR
(clock)
IN
(data in)
C01
C02
C03
C04
C22
CA
CI
tw7
tw6
5 V
th1 > 1 s
tsu4 > 1 s
4 Reset Pulses
22 Security Bits
5.5 V
5 V
tv
9 Configuration Bits
C01– C22
CA– CI
OUT
(previous data)
tsu3
High-Voltage
Programming Pulse
Previous data refers to data that was previously programmed into the device. If programmed for first time, this contains
a random test code from the factory.
Figure 5–2. EEPROM Write Mode
5.3
Internal Oscillator Operation for Transmit and Receive Modes Setting
Frequency
The TMS3637 has an internal oscillator that can be used in either the transmit or receive configurations of
the device. The oscillator free-running frequency (fosc) is controlled by an external resistor and capacitor
and is determined by:
fosc = 5 / (4 × Cosc × Rosc)
(1)
where
Cosc = capacitor from OSCC to GND
Rosc = resistor from OSCR to GND
The allowable oscillation range or Rosc versus VCC, and associated fosc values, and range versus Cosc for
three given values of Rosc are given in Section 4.
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