TDA8745 Datasheet, PDF (11/40 Pages) NXP Semiconductors – Satellite sound receiver with I2C-bus control

Philips Semiconductors
Satellite sound receiver with I²C-bus control
Preliminary specification
TDA8745
I²C-BUS PROTOCOL
Table 1 Slave receiver/transmitter address: D4 or D6 (HEX)
BIT 7
1
BIT 6
1
BIT 5
0
BIT 4
1
BIT 3
0
BIT 2
1
Notes
1. AS bit defined by level at address select (pin 12); 0 V = logic 0; 5 V = logic 1.
2. R/W = 0; TDA8745 is receiver (microcontroller is master transmitter).
R/W = 1; TDA8745 is transmitter (microcontroller is master receiver).
BIT 1
AS⁽¹⁾
TDA8745 receiver use
In the receiver mode the device has four subaddresses with auto-increment, as shown in Tables 2 to 5.
Table 2 Input byte SA: 00; situation after POR
IL2
IL1
IL0
IR2
IR1
IR0
TUN9
i7
i6
i5
i4
i3
i2
i1
0
0
0
0
0
1
1
Table 3 Tuning byte SA: 01; situation after POR
TUN7
t7
1
TUN6
t6
1
TUN5
t5
1
TUN4
t4
0
TUN3
t3
1
TUN2
t2
1
TUN1
t1
0
Table 4 Select byte SA: 02; situation after POR
TEST
BB
OS1
OS0
PDM
PE
OML
s7
s6
s5
s4
s3
s2
s1
0
0
0
0
0
0
1
Table 5 Audio byte SA: 03; situation after POR
LEV3
LEV2
LEV1
LEV0
NR
DEM1
DEM0
a7
a6
a5
a4
a3
a2
a1
1
1
0
0
1
1
1
TDA8745 transmitter use
No subaddress.
Table 6 Read byte
PDL
PDR
−
−
−
−
−
r7
r6
r5
r4
r3
r2
r1
0 or 1
0 or 1
1
1
1
1
1
BIT 0
R/W⁽²⁾
TUN8
i0
0
TUN0
t0
0
OMR
s0
1
BPFN
a0
0
POR
r0
0 or 1
1996 Mar 11
11