ST5090
II PROGRAMMABLE FUNCTIONS
For both formats of Digital Interface, programma-
ble functions are configured by writing to a num-
ber of registers using a 2-byte write cycle.
Most of these registers can also be read-back for
verification. Byte one is always register address,
while byte two is Data.
Table 1 lists the register set and their respective
adresses.
Table 1: Programmable Register Intructions
Function
Single byte Power up/down
Write CR0
Read-back CR0
Write CR1
Read-back CR1
Write Data to receive path
Read data from DR
Write Data to DX
Write CR4
Read-back CR4
Write CR5
Read-back CR5
Write CR6
Read-back CR6
Write CR7
Read-back CR7
Write CR8
Read-back CR8
Write CR9
Read-back CR9
Write CR10
Read-back CR10
Write CR11
Read-back CR11
Write Test Register CR14
Address byte
76543210
Data byte
P X X X X X 0 X none
P 0 0 0 0 0 1 X see CR0 TABLE 2
P 0 0 0 0 1 1 X see CR0
P 0 0 0 1 0 1 X see CR1 TABLE 3
P 0 0 0 1 1 1 X see CR1
P 0 0 1 0 0 1 X see CR2 TABLE 4
P 0 0 1 0 1 1 X see CR2
P 0 0 1 1 0 1 X see CR3 TABLE 5
P 0 1 0 0 0 1 X see CR4 TABLE 6
P 0 1 0 0 1 1 X see CR4
P 0 1 0 1 0 1 X see CR5 TABLE 7
P 0 1 0 1 1 1 X see CR5
P 0 1 1 0 0 1 X see CR6 TABLE 8
P 0 1 1 0 1 1 X see CR6
P 0 1 1 1 0 1 X see CR7 TABLE 9
P 0 1 1 1 1 1 X see CR7
P 1 0 0 0 0 1 X see CR8 TABLE 10
P 1 0 0 0 1 1 X see CR8
P 1 0 0 1 0 1 X see CR9 TABLE 11
P 1 0 0 1 1 1 X see CR9
P 1 0 1 0 0 1 X see CR10 TABLE 12
P 1 0 1 0 1 1 X see CR10
P 1 0 1 1 0 1 X see CR11 TABLE 13
P 1 0 1 1 1 1 X see CR11
P 1 1 1 0 0 1 X reserved
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
bit 7 of the address byte and data byte is always the first bit clocked into or out from: CI and CO pins when MICROWIRE serial
port is enabled.
X = reserved: write 0
”P” bit is Power up/down Control bit. P = 1 Means Power Down.
Bit 1 indicates, if set, the presence of a second byte.
Bit 2 is write/read select bit.
Registers CR12, CR13, and CR15 are not accessible.
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