tda9870ah NXP Semiconductors, tda9870ah Datasheet - Page 81

• Manufacturer Part Number: tda9870ah
• Description: Digital Tv Sound Processor Dtvsp
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 93 General format for entering the expert mode and writing coefficients into the TDA9870A
Table 94 Explanation of Table 93
Table 95 General format (notes 1, 2 and 3)
Notes
1. X = don’t care.
2. MST = most significant third.
3. LST = least significant third.
Table 96 Transfer of two coefficients
1999 Dec 20
S
SLAVE ADDRESS
0
ACK
10000000
CRAM ADDRESS
DATA
P
1 data byte
2 data byte
1 data byte
2 data byte
3 data byte
S
Digital TV Sound Processor (DTVSP)
BYTE
BYTE
ADDRESS
SLAVE
BIT
a
a
a
a
b
a
a
a
a
b
0
ACK
a
a
a
a
b
START condition
7-bit device address
data direction bit (write to device)
acknowledge
pattern to enter the expert mode
start address of coefficient RAM to write to
data byte containing part of a coefficient
STOP condition
10000000
a
a
a
a
b
DATA
DATA
a
X
a
b
b
X
a
a
b
b
ACK
X
a
a
b
b
81
ADDRESS
CRAM
X
a
a
b
b
2 MST of 1st coefficient
1 LST of 1st coefficient
2 MST of 1st coefficient
1 LST of 1st coefficient + 1 MST of 2nd coefficient
2 LST of 2nd coefficient
FUNCTION
ACK
DATA
DESCRIPTION
DESCRIPTION
ACK
DATA
Product specification
TDA9870A
ACK
P