Registers
STA309A
58/67
Doc ID 13855 Rev 4
7.3
Reading a coefficient from RAM
1.
write top 2-bits of address to I
2
C register 0x3B
2.
write bottom 8-bits of address to I
2
C register 0x3C
3.
read top 8-bits of coefficient in I
2
C address 0x3D
4.
read middle 8-bits of coefficient in I
2
C address 0x3E
5.
read bottom 8-bits of coefficient in I
2
C address 0x3F
7.4
Reading a set of coefficients from RAM
1.
write top 2-bits of address to I
2
C register 0x3B
2.
write bottom 8-bits of address to I
2
C register 0x3C
3.
read top 8-bits of coefficient in I
2
C address 0x3D
4.
read middle 8-bits of coefficient in I
2
C address 0x3E
5.
read bottom 8-bits of coefficient in I
2
C address 0x3F
6.
read top 8-bits of coefficient b2 in I
2
C address 0x40
7.
read middle 8-bits of coefficient b2 in I
2
C address 0x41
8.
read bottom 8-bits of coefficient b2 in I
2
C address 0x42
9.
read top 8-bits of coefficient a1 in I
2
C address 0x43
10. read middle 8-bits of coefficient a1 in I
2
C address 0x44
11. read bottom 8-bits of coefficient a1 in I
2
C address 0x45
12. read top 8-bits of coefficient a2 in I
2
C address 0x46
13. read middle 8-bits of coefficient a2 in I
2
C address 0x47
14. read bottom 8-bits of coefficient a2 in I
2
C address 0x48
15. read top 8-bits of coefficient b0 in I
2
C address 0x49
16. read middle 8-bits of coefficient b0 in I
2
C address 0x4A
17. read bottom 8-bits of coefficient b0 in I
2
C address 0x4B
7.5
Writing a single coefficient to RAM
1.
write top 2-bits of address to I
2
C register 0x3B
2.
write bottom 8-bits of address to I
2
C register 0x3C
3.
write top 8-bits of coefficient in I
2
C address 0x3D
4.
write middle 8-bits of coefficient in I
2
C address 0x3E
5.
write bottom 8-bits of coefficient in I
2
C address 0x3F
6.
write 1 to W1 bit in I
2
C address 0x4C