ST HTSSOP38, Manual

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Programming manual L6482
62/73 Doc ID 023768 Rev 1
9.2.2 Nop
Nothing is performed.
9.2.3 SetParam (PARAM, VALUE)
The SetParam command sets the PARAM register value equal to VALUE; PARAM is the
respective register address listed in
Table 11 .
The command should be followed by the new register VALUE (most significant byte first).
The number of bytes composing the VALUE argument depends on the length of the target
register (see
Table 11 ).
Some registers cannot be written (see Table 11 ); any attempt to write one of those registers
causes the command to be ignored and the WRONG_CMD flag to rise at the end of the
command byte, as if an unknown command code were sent (see
Section 9.1.21 ).
Some registers can only be written in particular conditions (see Table 11 ); any attempt to
write one of those registers when the conditions are not satisfied causes the command to be
ignored and the NOTPERF_CMD flag to rise at the end of the last argument byte (see
Section 9.1.21 ).
Any attempt to set an inexistent register (wrong address value) causes the command to be
ignored and the WRONG_CMD flag to rise at the end of the command byte as if an
unknown command code were sent.
9.2.4 GetParam (PARAM)
Table 48. Nop command structure
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 0 0 0 0 0 From host
Table 49. SetParam command structure
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 0 PARAM
From host
VALUE Byte 2 (if needed)
VALUE Byte 1 (if needed)
VALUE Byte 0
Table 50. GetParam command structure
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 1 PARAM from host
ANS Byte 2 (if needed) to host
ANS Byte 1 (if needed) to host
ANS Byte 0 to host