DS2480 Dallas Semiconducotr, DS2480 Datasheet - Page 11

• Manufacturer Part Number: DS2480
• Description: Serial 1.Wire Line Driver
• Manufacturer: Dallas Semiconducotr

The syntax of configuration commands is very simple.
Each 8–bit code word contains a 3–bit parameter code
to specify the parameter and the 3–bit value code to be
selected. Bit 7 of the command code is set to 0 and bit 0
is always a 1. To read the value code of a parameter, one
writes all zeros for the parameter code and puts the
parameter code in place of the parameter value code.
Table 5 shows the details.
CONFIGURATION COMMAND CODES Table 5
CONFIGURATION COMMAND RESPONSE BYTE Table 6
Write Parameter
Read Parameter
Write Parameter
Read Parameter
FUNCTION
FUNCTION
BIT 7
BIT 7
0
0
0
0
BIT 6
BIT 6
0
parameter code
same as sent
same as sent
BIT 5
BIT 5
0
The configuration command response byte is similar to
the command byte itself. Bit 0 of the response byte is
always 0. When writing a parameter, the upper 7 bits are
the echo of the command code. When reading a param-
eter, the current value code is returned in bit positions 1
to 3 with the upper 4 bits being the same as sent (see
Table 6).
BIT 4
BIT 4
0
BIT 3
BIT 3
parameter value code
parameter value code
parameter code
same as sent
BIT 2
BIT 2
BIT 1
BIT 1
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BIT 0
BIT 0
DS2480
1
1
0
0