VME-NIMIO32

VME-NIMIO32 - general purpose VME FPGA board

References

• [1] VME-NIMIO32 (REA 131) project page on edev.triumf.ca
• [2] Rev0 board schematics
• [3] Rev1 board schematics

General characteristics

Available hardware

• Altera cyclone 1 FPGA: EP1C6Q240C6N
• external SDRAM memory
• VME interface: VME-D[31..0] bidirectional, VME-A[19..0] input only, DTACK output, no BERR, no RETRY/RESP. VME-A[31..20] input only connected only to address decoder FPGA (Altera MAX-something CPLD). This permits all single-word transfer modes, 32-bit DMA (BLT32) and 2eVME DMA (only drives D-lines, but still faster than BLT32). 64-bit DMA (MBLT64) and 2eSST are impossible.
• 16 NIM outputs
• 16 NIM inputs
• 16 ECL/LVDS inputs compatible with LeCroy 4616 ECL/NIM/ECL converter. (Except: Rev0 boards have an incompatible ECL connector)
• 16 "red" and 16 "green" LEDs
• 1 "VME access" LED
• 1 RJ-45 high speed serial I/O interface

Firmware functions

Generic IO32 firmware can include a number of functions. Not all functions are available all at the same time due to resource limitations on the FPGA. Refer to VME Registers for detailed information.

• 20 MHz 32-bit timestamp clock register
• 16 bits of NIM output register (first 4 NIM outputs are multi-function)
• 16 bits of NIM and 16 bits of ECL/LVDS input register with latch function.
• 32 scalers 32 bit, up to 300 MHz counting rate
• 4 timestamp registers using the 20 MHz timestamp clock. Any of the 32 inputs can be routed into any of the 4 timestamp registers.
• experimental 4-channel TDC. 10 ns base clock with 0.3 ns interpolation ladder (1 ns RMS).

Firmware revisions

To find out the current firmware revision, read VME register 0, i.e. run "test_VMENIMIO32_gef.exe --addr 0xN00000 --read 0".

To write Cyclone 1 FPGA firmware into the flash memory, use a JTAG programmer or a VME programmer: "srunner_vme_gef.exe -program -64 ~/daq/VME-NIMIO32/VME-NIMIO32/VME-NIMIO32/VME-NIMIO32.pof 0xN00020", where "N" is the A24 VME base address.

To reboot the Cyclone 1 FPGA into the new firmware, run "test_VMENIMIO32_gef.exe --addr 0xN00000 --read 0 --write 1 2 --read 0 --sleep 1 --read 0", where "N" is the A24 VME base address. This requires firmware 0x01100810 or newer and the "fpga-reset" hardware modification.

• 0x01100810 - first revision of generic firmware

Manual

VME interface

Firmware 0x01100810 implements VME A24/D32 access only. A24 addresses 0x00N0xxxx are decoded, where "N" is the A24 base address set by rotary switch SW3 "ADDRESS 20-23".

VME accessible registers are listed in the table below. VME address offsets are register numbers multiplied by 4, i.e. CSR register 1 is at address 0x00N00004. Flash programmer register 8 is at 0x00N00020 (use this address with srunner_vme flash programmer).

Registers

Number	Name	Access	FwRev	Description
0	FwRev	RO		Firmware revision
1	CSR	RW		CSR Bits
2	NIM output	RW		NIM output control: bits 15..0: NIM outputs, 31..16: NIM output function control, see below
3	NIM input	R		bits 15..0: status of NIM inputs, bits 31..16: latched NIM inputs
		W		bits 15..0: reset latch for corresponding NIM inputs (0xFFFF resets latch for all 16 bits
4	example 1	RW		example 32-bit read-write register
5	example 2	RW	0x01100810	bits 15..0 control example scaledown, bits 31..16 control example delay, see NIM output function control
6	timestamp	R	0x01100810	on read, reads the timestamp clock and latches the 32 input scalers (causing scaler deadtime. FIXME!!!)
		W	0x01100810	on write, clears the 32 input scalers
7	LVDS input	RW		ECL/LVDS inputs, works same as register 3
8	Flash programmer	RW		controls the 0xABCD ASMI Flash programmer. For use with "srunner_vme".
9	TDC4	RW		experimental 4 channel TDC. on read, reads the TDC FIFO. on write, resets the TDC.
10	TSC control	RW	0x01100810	on write, resets the TSCs. Controls signal routing for the 4 TSC units: bits 0..4 select one of the 32 channels routed into TSC1, 5..10 for TSC2, and so forth.
11	unused
12, 13, 14, 15	TSC data	R	0x01100810	reads the TSC data fifo. Empty FIFO returns value 0.
16..31	NIM scalers	R		read the latched value of NIM input scalers
32..47	LVDS scalers	R		read the latched value of LVDS input scalers
47..64	unused

Board modifications

Rev0 modifications

• none

Rev1 modifications

• fpga-reset-mod

K.O.