
Software specification
TDA7540N
Swallow mode: fVCO/fSYN = LSB + MSB + 32
Table 14.
Addr 1 PLL counter 1 (LSB)
MSB
LSB
Function
d7
d6
d5
d4
d3
d2
d1
d0
00000000
LSB = 0
00000001
LSB = 1
00000010
LSB = 2
-----
---
-
11111100
LSB = 252
11111101
LSB = 253
11111110
LSB = 254
11111111
LSB = 255
Table 15.
Addr 2 PLL counter 2 (MSB)
MSB
LSB
Function
d7
d6
d5
d4
d3
d2
d1
d0
00000000
MSB = 0
00000001
MSB = 256
00000010
MSB = 512
-----
---
-
11111100
MSB = 64768
11111101
MSB = 65024
11111110
MSB = 65280
11111111
MSB = 65536
Table 16.
Addr 3,4 TV1,2
MSB
LSB
Function
d7
d6
d5
d4
d3
d2
d1
d0
0000000
Tuning Voltage Offset = 0
0000001
TVO = 25mV
0000010
TVO = 50mV
-----
---
-
1111111
TVO = 3175mV
0-TVO
1+TVO