參數(shù)資料
型號(hào)： 935263935118
廠商： NXP SEMICONDUCTORS
元件分類： 調(diào)諧器
英文描述： 2-BAND, VIDEO TUNER, PDSO28
封裝： PLASTIC, SOT-341, SSOP-28
文件頁(yè)數(shù)： 25/48頁(yè)
文件大小： 242K
代理商： 935263935118
2000 Aug 02
31
Philips Semiconductors
Product specication
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
TDA6502; TDA6502A;
TDA6503; TDA6503A
13.5.2
READ SEQUENCES FROM REGISTER C3
Tables 25 and 26 show the various read sequences where:
S = START bit
A = acknowledge bit
XX = read status byte
X = no acknowledge from the master means end of sequence
P = STOP bit
Table 25 One status byte acquisition
Table 26 Two status bytes acquisition
13.6
Examples of 3-wire bus data format sequences for TDA6502 and TDA6503
13.6.1
18-BIT SEQUENCE
Conditions:
fosc = 800 MHz
Port register PUHF is ‘on’.
Table 27 18-bit sequence
The reference divider is automatically set to 64 assuming that bit RSB has been set to logic 1 at power-on. If bit RSB has
been set to logic 0, in a previous 27-bit sequence, the reference divider will still be set at 80. In this event, the 18-bit
sequence has to be adapted to the 80 divider ratio.
13.6.2
19-BIT SEQUENCE
Conditions:
fosc = 650 MHz
Port register PUHF is ‘on’.
Table 28 19-bit sequence
The reference divider is automatically set to 128 assuming that bit RSB has been set to logic 1 at power-on. If bit RSB
has been set to logic 0 in a previous 27-bit sequence, the reference divider will still be set at 80. In this event, the 19-bit
sequence has to be adapted to the 80 divider ratio.
START
ADDRESS BYTE
ACK
STATUS BYTE
ACK
STOP
SC3
A
XX
X
P
START
ADDRESS BYTE
ACK
STATUS BYTE
ACK
STATUS BYTE
ACK
STOP
S
C3
A
XX
A
XX
X
P
PUHF FMST PVHFH PVHFL
N13
N12
N11
N10
N9
N8
N7
N6
N5
N4
N3
N2
N1
N0
1
0
1
0
0100000000
PUHF FMST PVHFH PVHFL
N14
N13
N12
N11
N10
N9
N8
N7
N6
N5
N4
N3
N2
N1
N0
1
0
10100
0101000000
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