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參數(shù)資料
| 型號： | MC44BC374T1 |
| 廠商： | Motorola, Inc. |
| 英文描述： | PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC |
| 中文描述： | 鎖相環(huán)調(diào)諧PAL / NTSC制式的超高頻和甚高頻音頻/視頻調(diào)制器的高集成芯片 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 635K |
| 代理商： | MC44BC374T1 |
2
C Compatible Bus
MOTOROLA
MC44BC373/374
Technical Data
For More Information On This Product,
Go to: www.freescale.com
19
13.3 Levels Definition
Figure 12. SDA Levels
13.4 High-Speed I
2
C Compatible Bus Format
Figure 13. SCL and SDA Bus Timing
13.5 I
2
C Write Mode Format and Bus Receiver
The bus receiver operates the I
2
C compatible data format. The chip address (I
2
C bus) is:
In write mode, each ninth data bit (bits 9, 18, 27, 36, and 45) is an acknowledge bit (ACK) during which
the MCU sends a logic 1 and the Modulator circuit answers on the data line by pulling it low. Besides the
chip address, the circuit needs two or four data bytes for operation. The following data byte sequences are
the permitted incoming information:
After the chip address, two or four data bytes may be received.
If three (3) data bytes are received, the third one is ignored.
If five (5) or more data bytes are received, the fifth and following ones are ignored, and the last ACK
pulse is sent at the end of the fourth data byte.
1 1 0 0 1 0 1 0 (ACK) = $CA (hex) in write mode
Example 1
Example 2
Example 3
Example 4
STA
STA
STA
STA
CA
CA
CA
CA
C1
FM
C1
FM
C0
FL
C0
FL
STO
STO
FM
C1
FL
C0
STO
STO
With:
STA = Start condition
FM = Frequency information, high order bits
C1 = Control information, high order bits
STO = Stop condition
CA = Chip Address
FL = Frequency information, low order bits
CO = Control information, low order bits
SDA
...
0V
Vcc
Vih
Vil
dead band
1
2
3
4
5
6
7
8
9 10
14
11 12 13
45
44
15
19
16 17 18
STA
Chip Address ($CA)
ACK
ACK
First Data Byte (C1 or FM)
Data
ACK
Stop
SCL
SDA
F
Freescale Semiconductor, Inc.
n
.
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相關代理商/技術參數(shù) |
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| MC44BC374T1D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC44BC375 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuned VHF Audio/ Video High Integration Modulator ICs |
| MC44BC375J | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuned VHF Audio/ Video High Integration Modulator ICs |
| MC44BC375JD | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PLL Tuned VHF Audio/Video High Integration Modulator ICs |
| MC44BC375T | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuned VHF Audio/ Video High Integration Modulator ICs |
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