Operation Manual

10
3 0: Device will respond to I2C address 0x62. Device will also respond to
non-default address if congured successfully. See I2C_ID_HIGH (0x18),
I2C_ID_LOW (0x19), and I2C_SEC_ADDR (0x1a).
1: Device will only respond to non-default I2C address. It is recommended to
congure the non-default address rst, then use the non-default address to
write to this register, ensuring success.
0x40
R/W Name Description Initial Value
R/W COMMAND State command --
Bit Function
2:0 000: Test mode disable, resume normal operation
111: Test mode enable, allows download of correlation record
Select correlation memory bank in ACQ_SETTINGS (0x5d) prior to enabling
test mode.
Once test mode is enabled, read CORR_DATA (0x52) and CORR_DATA_
SIGN (0x53) in one transaction (read from 0xd2). The memory index is
incremented automatically and successive reads produce sequential data.
0x45
R/W Name Description Initial Value
R/W MEASURE_
DELAY
Delay between automatic measurements 0x14
Bit Function
7:0 Non-default delay after completion of measurement before automatic retrigger,
in burst and continuous modes. ACQ_CONFIG_REG (0x04) bit 5 must be set.
Value 0xc8 corresponds to 10 Hz repetition rate and 0x14 to roughly 100 Hz.
0x4c
R/W Name Description Initial Value
R PEAK_BCK Second largest peak value in correlation
record
--
Bit Function
7:0 The value of the second highest peak in the correlation record.
0x52
R/W Name Description Initial Value
R CORR_DATA Correlation record data low byte --
Bit Function
7:0 Correlation record data low byte. See CORR_DATA_SIGN (0x53), ACQ_
SETTINGS (0x5d), and COMMAND (0x40).
0x53
R/W Name Description Initial Value
R CORR_DATA_SIGN Correlation record data high byte --
Bit Function
7:0 Correlation record data high byte. Correlation record data is a 2’s complement
9-bit value, and must be sign extended to be formatted as a 16-bit 2’s
complement value. Thus when repacking the two bytes obtained for the I2C
transaction, set the high byte to 0xff if the LSB of the high byte is one.
0x5d
R/W Name Description Initial Value
R/W ACQ_SETTINGS Correlation record memory bank select --
Bit Function
7:6 11: Access correlation memory bank. Write prior to test mode enable, see
COMMAND (0x40).
0x65
R/W Name Description Initial Value
R/W POWER_CONTROL Power state control 0x80
Bit Function
2 1: Device Sleep, wakes upon I2C transaction. Registers are reinitialized,
wakeup time similar to full reset using enable pin.
0: Device awake
0 1: Disable receiver circuit
0: Enable receiver circuit. Receiver circuit stabilizes by the time a
measurement can be performed.