Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 11 / 29
8. Application Information
8.1 Tuner I2C control
Write Data format: (MSB is transmitted first)
Name Byte B7 B6 B5 B4 B3 B2 B1 B0
Ack
Address Byte 1 AB1 1 1 0 0 0 MA1 MA0 0 A
Prog. Divider Byte 2 DB2 0 N14 N13 N12 N11 N10 N9 N8 A
Prog. Divider Byte 3 DB3 N7 N6 N5 N4 N3 N2 N1 N0 A
Control Data Byte 4 CD4 1 C1 C0 R4 R3 R2 R1 R0 A
Control Data Byte 5 CD5 BS1 BS0 SL1 SL0 P3 P2 P1 P0 A
Control Data Byte 6 CD6 X 0 ATC IFE X AT2 AT1 AT0 A
Control Data Byte 7 CD7 SAS
X AGD
ADS T3 T2 T1 T0 A
Following is the detail breakdown of each byte:
a) MA1, MA2 : address bits
b) N14- N0 : programmable division ratio bits
c) R4 - R0 : reference divider ratio select
d) C1, C0 : charge pump current select
e) BS1 – BS0 : band select bits
f) SL1 – SL0 : Power down modes
g) SAS : Saw filter drive output select
h) P3 – P0 : Port P3 – P0 output states
i) ADS : ADC input select
j) ATC : AGC decay current
k) AGD : AGC disable
l) AT2:AT0 : AGC setting
m) T3 – T0 : test mode
n) IFE : IF AGC amplifier enables
o) POR : power ON reset indicator
p) FL : phase lock flag
q) AGF : AGC active flag
r) V2:V0 : ADC out
s) X : don’t care
Read Data format: (MSB is transmitted first)
Name Byte B7 B6 B5 B4 B3 B2 B1 B0 Ack
Address Byte 1 AB1 1 1 0 0 0 MA1 MA0 1 A
Status Byte SB2 POR FL 0 0 AGF V2 V1 V0 A