IC-GD datasheet(44/55 Pages) ICHAUS

44 / 55 page

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iC-GD

UNIVERSAL I/O INTERFACE

Rev A1, Page 44/55

Addr

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

I2C communikation

0x41

I2C_DEV_ADR(7:0)

0x42

I2C_PTR(7:0)

0x43

I2C_MODE(7:4)

I2C_BYTES(3:0)

0x44

I2C_DATA_B1(7:0)

0x45

I2C_DATA_B2(7:0)

0x46

I2C_DATA_B3(7:0)

0x47

I2C_DATA_B4(7:0)

ASIC revision & identification

0x48

REV(7:0)

0x49

CHARGE(7:0)

0x4A

WAFER(4:0)

CHIP(10:8)

0x4B

CHIP(7:0)

Secondary channel status register

0x4E

CH_STAT_1S(6:0)

0x4F

CH_STAT_2S(6:0)

SPV_REG

0x52

ST_CALIB

ST_CONF

ST_CT2

ST_CT1

ST_BIAS

ST_VDA

ST_VNB

ST_VB

Table 39: Register layout

Unless otherwise noted, a ’1’ activates and a ’0’ deac-

tivates a function. Registers with the suffix _x refer to

both channel 1 and 2. Their function is the same but

the channels can be configured independently.

The right hand side of the register header contains the

following values:

’L’: Shows that the register can be locked, see register

SPI_LOCK_RESET.

’K’: Marks those configuration registers which values

are read from the external EEPROM during start-up.

’P’, ’S’: Represent the primary or secondary mode.

Some registers refer to both modes and carry both

letters, others are independent of the modes and carry

’/’ instead.

’R’, ’W’: Represents the access modes ’read’ and

’write’.

’(*)’: Represents the possibility of automatic configu-

ration. Here, the iC autonomously selects the data

content when required.

Finally, the default value that the register takes up after

start-up is given. In configuration registers, this value is

overwritten with the value of the EEPROM, if the regis-

ter contains a configuration with a valid CRC value.

IO_SEL_xP, IO_SEL_xS, DO_ADR0_2

The primary and secondary mode for each channel

can be selected via the registers IO_SEL_xP and

IO_SEL_xS. For the secondary mode, digital voltage

and current in- and outputs are available. For the pri-

mary mode, in addition, a counter that optionally can

function as PWM generator and a temperature mea-

surement is available. Chapter ’Mixed operation’ shows

possible combinations.

The exact function of the selected modes can be set by

the relevant registers.

If the temperature measurement is selected in register

IO_SEL_xP and the PT elements are selected in regis-

ter TM_SEL_x, the register IO_SEL_xS is automatically

overwritten with the selection CO to provide the current

required for the measurement.

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