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參數(shù)資料
| 型號(hào)： | TDA9950TT/C2,512 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, SOT360-1, MO-153, TSSOP-20 |
| 文件頁數(shù)： | 21/24頁 |
| 文件大?。?/td> | 112K |
| 代理商： | TDA9950TT/C2,512 |
TDA9950_1
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2007
6 of 24
NXP Semiconductors
TDA9950
CEC/I2C-bus translator
Registers 01h to 06h are used for conguration of the TDA9950, whilst repeated
auto-incremented reads starting at register 07h are used to transfer CEC data. Setting the
address pointer register higher than 07h is treated as setting it to 07h, as all message
data transfers must start from register 07h and continue by auto-incrementing in one
contiguous transfer. Transfers via the data registers are formatted using the data register
protocol described in Section 8.5.
8.3 Use of the INT line
As the TDA9950 is an I2C-bus slave device, it provides an additional I/O line to signal to
the host that data is available for reading. This is the INT output line, which should be
monitored by the host. An additional TDA9950 input, on pin INT_POL, allows conguration
of the polarity of operation of the INT line. When the INT line is active, it will match the
state of the input on pin INT_POL.
The state of the INT line is always reected in the TDA9950 Status Register, so it is
possible to regularly poll this register instead of monitoring the INT line. However, this
method is less efcient and not recommended. The INT indication in the TDA9950 Status
Register is not affected by the setting of the INT polarity input on pin INT_POL.
8.4 Register descriptions
Table 6.
APR - Address Pointer Register (address 00h) bit description (Write mode)
Bit
Symbol
Description
7 to 5
reserved
reserved (must be set to 000)
4 to 0
REG_PTR[4:0]
Address Pointer: Address of the register that will be
read/written during further I2C-bus communication.
Table 7.
CSR - TDA9950 Status Register (address 00h) bit description (Read mode)
Bit
Symbol
Description
7
BUSY
BUSY:
0 = the TDA9950 is able to handle requests.
1 = the TDA9950 is busy and cannot accept any further
request.
6
INT
INT:
0 = the INT interrupt output is inactive.
1 = the INT interrupt output is active.
5
ERR
ERR:
0 = no error.
1 = an error occurred (specied in the TDA9950 Error
Register). Cleared by a read of the TDA9950 Error Register.
4 to 0
-
not used
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