TDA6508 Datasheet, PDF (11/42 Pages) NXP Semiconductors – 3-band mixer/oscillator and PLL for terrestrial tuners

Philips Semiconductors
3-band mixer/oscillator and PLL for
terrestrial tuners
Product specification
TDA6508; TDA6508A;
TDA6509; TDA6509A
Table 6 Read data format
NAME
BYTE
MSB⁽¹⁾
Address byte ADB
1
1
0
Status byte
SB
POR
FL
1
Note
1. MSB is transmitted first.
BIT
0
0
1
1
MA1
A2
MA0
A1
LSB
R/W = 1
A0
Table 7 Description of the bits used in Table 6
BIT
MA1 and MA0
R/W
POR
FL
A2, A1 and A0
DESCRIPTION
programmable address bits; see Table 3
read/write mode selection; 1 = read mode
Power-on reset flag:
0: after end of the first read sequence
1: at Power-on
in-lock flag:
0: loop is not locked
1: loop is locked
digital outputs of the 5-level ADC; see Table 8
Table 8 Digital outputs for analog to digital converter (note 1)
A2
0
0
0
0
1
A1
0
0
1
1
0
A0
0
1
0
1
0
VOLTAGE APPLIED TO PIN ADC
0 V_CC to 0.15 V_CC
0.15 V_CC to 0.3 V_CC
0.3 V_CC to 0.45 V_CC
0.45 V_CC to 0.6 V_CC
0.6 V_CC to 1 V_CC
Note
1. Accuracy is ±0.03 × V_CC.
8.4 Power-on reset
The threshold level for the power-on reset supply voltage V_POR is set to 3.2 V at room temperature. Below this threshold,
the device is reset to the power-on state.
The following actions take place In the power-on state:
• The charge-pump current is set to 100 µA
• Test bits T2, T1 and T0 are set to logic 001; the charge-pump can either sink or source current
• The Weak signal booster is disabled
• All ports are off and the HIGH band is selected by default.
2005 Mar 25
11