Diamond Power Products MM-48-AT user manual Base + Write Calibration Control Register

Base + 14	Write	Calibration Control Register
Bit No.	7	6	5	4	3	2	1	0
Name	EE_EN	EE_RW	RUNCAL	CMUXEN	TDACEN

This register is used to initiate various commands related to autocalibration. More detailed information on autocalibration may be found elsewhere in this manual.

EE_EN	EEPROM Enable. Writing a 1 to this bit will initiate a transfer to/from the
	EEPROM as indicated by the EE_RW bit.
EE_RW	Selects read or write operation for the EEPROM: 0 = Write, 1 = Read.
RUNCAL	Writing 1 to this bit causes the board to reload the calibration settings from
	EEPROM.
CMUXEN	Calibration multiplexor enable. The cal mux is used to read precision on-board
	reference voltages that are used in the autocalibration process. It also can be
	used to read back the value of analog output 0.
	1 = enable cal mux and disable user analog input channels
	0 = disable cal mux, enable user inputs
TDACEN	TrimDAC Enable. Writing 1 to this bit will initiate a transfer to the TrimDAC (used
	in the autocalibration process).
Base + 14	Read	Calibration Status Register
Bit No.	7	6	5	4	3	2	1	0
Name	0	TDBUSY	EEBUSY	CMUXEN	TDACEN	0	0	0
TDBUSY	TrimDAC busy indicator

0User may access TrimDAC

1TrimDAC is being accessed; user must wait

EEBUSY EEPROM busy indicator

0User may access EEPROM

1EEPROM is being accessed; user must wait

Base + 15 Write EEPROM Access Key Register

The user must write the value 0xA5 (binary 10100101) to this register each time after setting the PAGE bit in order to get access to the EEPROM. This helps prevent accidental corruption of the EEPROM contents.

Base + 15 Read FPGA Revision Code

This register may be read back to indicate the revision level of the FPGA code. The FPGA revision starts at 1 and increments up each time the code is revised.

Diamond-MM-48-AT User Manual V1.01 Page 26