GE VMIVME-4514 Scan I/O board

Description

Model: VMIVME-4514，Due to the large number of goods, only some goods have been uploaded. If you can’t find the goods you want, please consult the seller, and we will serve you wholeheartedly.

All Control Registers are reset by a VMEbus system reset. All control

registers except Interrupt Control Register (ICR) and Interrupt Vector Register (IVR) are

reset by writing to location $000C. Either reset operation initializes the board to the

following configurations:

1. Continuous scanning operating mode at 100 kHz rate
2. 64-channel block size (32 for 32-channel option, 16 for 16-channel

option)

1. 64-data word buffer size (32 for 32-channel option, 16 for 16-channel

option)

1. Automatic gain set to x1
2. Offset binary data coding
3. Self-test LED ON
4. Data Ready flag at end-of-buffer

The Analog-to-Digital Converter (ADC) will go through a calibration cycle on

VMIVME-4514 either a system reset or software reset. The user can initiate a calibration cycle by

writing to location $000C. The data written to this location is arbitrary. If the automatic

gain mode has been selected in the Configuration Control Register, channel gains

other than x1 must be programmed as described in Section 4.3.9.

Bufc [4:0] – Buffer Configuration control bits. This field is used to configure

the available buffer size/block size combinations.

Groupc [5:0] – Channel group control bits. This field is used to select which

VMIVME-4514 group of channels will be active for scanning. It is also used to enter the desired

channel in Random Access mode. If the buffer field is loaded with $00, $03, $07, $0C,

$11, or $16 the entire buffer will be filled with the channel indicated by the group field.

This is similar to Random Access, except the entire buffer is filled and not just the first

location. Examples on how to use the Configuration Control Register are shown in the

following paragraphs.

I Source – A logical 1 written to this bit location causes a VMEbus interrupt

VMIVME-4514 request, when enabled, to be generated by the Data Counter. This allows an interrupt

request to be generated when a programmed number of conversions have been

completed. A logical 0 written to this location causes a VMEbus interrupt request,

when enabled, to be generated by the Data RDY flag. This allows an interrupt request

to be generated at the middle or the end of the data buffer. (Default is logic 0.)

Gmode [1:0] – Gain Mode control bits. This field is used to configure the

channel gains as shown in Table 4.3.3-2. Fixed gains apply to all active channels. In

Auto Gain mode the gain programmed into the channel x Auto Gain location is applied

to channel x. (Default is logic 00.)

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