CH Tech Pulse Generator

3.5 CONFIGURATION REGISTERS

There are several types of registers used to configure and control the VX462B. The VXI

configuration registers provide for control and st atus as required by the VXIbus specification.

The other register provides board-leve l contro l and status of the pulse r epetition interval, pulse

width, trigger modes and delay times, and output amplitude. An address map of the registers is

shown in Table I.

3.5.1 VXI Configuration Registers

The VXI configuration registers contain basic information needed to configure a VXIbus system.

The configuration information includes: manufacturer identificatio n, produc t model c ode, device

type, memory requirements, device status, and device control. The registers are briefly described

below and are detailed in Figure 5.

VXI Identification (ID) Register (Base + 00h) - A read of this register provides

manufact urer iden tification, device c lassification (i.e., register based), and the address ing

mode ( A16). A wr ite to t his register has no effect .

VXI Device Type Register (Base + 02h) - A read of this register provides the model code

identifier . A write to this re gister has no effect.

VXI Status/Cont rol Register (Base + 04h) - A read of this register provides the state of

P2 MODID* line, and the Ready and self-test Passed status. A write to bit 0 of this

Table I. VXI Register Address Map

A16 Address Write Register Description Read Register Description

Base + 12 Hi gh Reference Regi ster High Reference Register

Base + 10 Low Referen ce Register Low Reference Register

Base + 0E Pulse Control Register Pulse Control Register

Base + 0C Pulse Width Register Pulse Width Register

Base + 0A Delay Register Delay Register

Base + 08 PRI Register PRI Register

Base + 06 VXI Unused Register VXI Unused Register

Base + 04 VXI Control Register VXI Status Register

Base + 02 VXI Read Only Register VXI Device Type Register

Base + 00 VXI Read Only Register VXI ID Register

Bit D15 . . . . . D00 D15 . . . . . D00