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參數(shù)資料
| 型號： | TDA9875AH/V2,557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP |
| 文件頁數(shù)： | 77/96頁 |
| 文件大小： | 324K |
| 代理商： | TDA9875AH/V2,557 |
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1999 Dec 20
79
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
10.4
Slave transmitter mode
As a slave transmitter, the TDA9875A provides 13 registers with status information and data, a part of which is for Philips
internal purposes only. These registers can be accessed by means of subaddresses.
Table 86 General format for reading data from the TDA9875A
Table 87 Explanation of Tables 86 and 88
Reading of data can start at any valid subaddress. It is allowed to read more than 1 data byte per transmission from the
TDA9875A. In this situation, the subaddress is automatically incremented after each data byte, which results in reading
the sequence of data bytes from successive register locations, starting at SUBADDRESS.
Table 88 Format of a transmission using automatic incrementing of subaddresses
Note
1. n data bytes with auto-increment of subaddresses.
Each data byte in a read sequence, except for the last one, is acknowledged with Am (acknowledge by the master).
The subaddresses ‘wrap around’ from decimal 255 to 0. If an attempt is made to read from a non-existing subaddress,
the device will send a data pattern of all ones, i.e. FF in hexadecimal notation.
S SLAVE ADDRESS
0 ACK SUBADDRESS ACK Sr
SLAVE ADDRESS
1
ACK
DATA NAm P
BIT
FUNCTION
S
START condition
SLAVE ADDRESS
7-bit device address
0
data direction bit (write to device)
ACK
acknowledge (by the slave)
SUBADDRESS
address of register to read from
Sr
repeated START condition
1
data direction bit (read from device)
DATA
data byte read from register
NAm
not acknowledge (by the master)
Am
acknowledge (by the master)
P
STOP condition
S SLAVE ADDRESS
0 ACK SUBADDRESS ACK Sr
SLAVE
ADDRESS
1 ACK
DATA BYTE
Am(1)
DATA NAm P
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