SIS Documentation
SIS3800
Scaler/Counter
Page 18 of 39
A32 Broadcast Example:
Let four SIS3800 participate by setting the A_32 jumper and setting the base address of the
units to:
Unit 1: 0x32001000
Unit 2: 0x32001800
Unit 3: 0x32002000
Unit 4: 0x32002800
Switch on enable broadcast by setting bit 6 in the control register of the four units.
Enable broadcast handshake controller on unit 4 by setting bit 7 of its control register.
An A232 write to address 0x32000034 will clock the shadow register on units 1 through 4.
A24 Broadcast Example:
Let three SIS3800 participate by setting the A_24 jumper and setting the base address of the
units to:
Unit 1: 0x541000
Unit 2: 0x542000
Unit 3: 0x543000
Switch on enable broadcast by setting bit 6 in the control register of the three units.
Enable broadcast handshake controller on unit 1 by setting bit 7 of its control register.
An A24 write to address 0x540030 will clear the counters on units 1 through 3.
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