ZSC31015EIG1-R datasheet(30/53 Pages) RENESAS

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November 14, 2016

ZSC31015 Datasheet

3.3.

Command/Data Bytes Encoding

The 2-byte command sent to the ZSC31015 consists of 1 byte of command information and 1 byte of data

information. Regardless of whether the command requires data or not, 2 bytes MUST be sent. Table 3.4 lists all

the command/data pairings. (X=don’t care.)

Table 3.4

Command/Data Bytes Encoding

Note: Refer to Table 3.5 for the location in EEPROM for the bit fields (e.g., Gain_B) referenced in the table.

Command

Byte

Data

Description

00HEX

XXHEX

Read EEPROM command via SIG

™ pin.

‡

20HEX

5XHEX

DAC Ramp Test Mode. Gain_B[13:3] contains the starting point, and the increment is

(Offset_B/8). The increment will be added every 125µsec.

30HEX

WDHEX

W =

What

D =

Data

Trim/Configure: 3

rd nibble determines what is trimmed/configured. The 4th nibble is data to be

programmed.

rd Nibble

th Nibble Data

Description

0HEX

DHEX

Trim oscillator. Least significant 3 bits of data used.

1HEX

DHEX

Trim 1V reference. Least significant 4 bits of data used.

2HEX

DHEX

Offset Mode. Least significant 4 bits of data used.

3HEX

DHEX

Set output mode. Least significant 2 bits used.

4HEX

DHEX

Set update rate. Least significant 2 bits used.

5HEX

DHEX

Configure JFET regulation

6HEX

DHEX

Program the Tc_cfg register. Least significant 3 bits used.

Most significant bit of data nibble should be 0.

7HEX

DHEX

Program EEPROM bits [99:96] {SOT_cfg,Pamp_Gain}

DHEX

3HEX

0HEX,1HEX,2HEX

6HEX

4HEX,5HEX,7HEX

Program EEPROM bits [105:103]:

EEPROM locked! Int. PTAT used for temperature

EEPROM unlocked, Int. PTAT used for temperature

EEPROM locked! Ext. diode used for temperature

EEPROM unlocked, Ext. diode used for temperature

EHEX

DHEX

Program EEPROM bits [102:100] diag_cfg

40HEX

00HEX

Start NOM => Ends Command Mode; transition to Normal Operation Mode.

40HEX

10HEX

Start_RM = Start the Raw Mode (RM)

In this mode, if Gain_B = 800HEX and Gain_T = 80HEX, then the digital output will simply be the

raw values of the ADC for the Bridge reading, and the PTAT conversion.

50HEX

90HEX

Start_CM => Start the Command Mode; used to enter Command Interpret Mode.

60HEX

YYHEX

Program SOT (2

nd Order Term)

70HEX

YYHEX

Program TSETL (Set the MSB to 0.)

‡

For more details, refer to section 3.7.

§ For more details, refer to section 3.5.

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