ACT apricot - Description; Electrical Specification

EXPANSION SLOTS
Pin
Description Direction
MRDC
Memory Read Command
Output
10RC I/O Read Command Output
MRDY Memory Ready Input
10RDY I/O Ready Input
RES
System Reset
Output
CLKlS lSMHz Clock signal Output
CLKS SMHz Clock signal Output
DMAl DMA Request for DMA Ch. 1
Input
EXTl External Terminate (DMA Ch. l) Input
DMA2 DMA Request for DMA Ch. 2
Input
EXT2 External Terminate (DMA Ch. 2) Input
INT2 Interrupt Request (Priority 2) Input
INT3 Interrupt Request (Priority 3)
Input
NMI
Non-Maskable Interrupt Input
+12V
System Board supply rail Output
-l2V
"
"
Output
+SV
"
"
Output
DESCRIPTION
Electrical specification
Current Consumption
Maximum allowed current consumption of a circuit
board fitted into an expansion slot is:
O.SAfrom the +SVrail.
SOmA from the +12Vand-l2Vrails.
Signal Outputs
All signal outputs (data, address, control and clocks) have
the capability to drive a maximum of 2 LS TTL loads,i.e.
Logic
high state voltage (Voh) i
2.0 < Voh < 5.25 with Il)aximum high state output
source current of 40 JLA.