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processor peak performance is 55 VAX MIPS (related on drystones)
data and instruction cache size 16kbyte each
2 mbyte firmware
2 mbyte Flash EPROM Am29F016 (2,097,152 x 8–Bit)
VME bus master interface and slave interface to the dynamic RAM
Thin wire ethernet using Am7990
Fast Ethernet subsystem, based on DEC 21140A, National’s DP83840
and DP83223 supporting 10BaseT and 100BaseTX, Half– and Full Du-
plex and Autonegotiation; (100BaseT4 is not supported)
16–,32–,64–Mbyte dynamic RAM
8 RS232 channels using Z85C230, labeled as ”console”or ”tty00”, and
”tty01,...,tty09”;
2 RS485 channels using Z85C230, labeled as ”tty10” and ”tty20”
(connectable through one 8–pin Mini–D (”console”) and two 50–pin con-
nectors (”tty01,...,tty09”) at the front edge)
real time clock MK48T02 with 2 kbyte non volatile memory
configuration register, status register, interrupt register
component identification channel to handle the AQX/AQS component
identification system (CIS)
JTAG Boundary–Scan controller brings the JTAG test bus to the
Backplane.
CAN Bus controller based on PCF82C200 (not implemented)
2. 4. Construction
The CCU is a VME Bus module of 4 TE with an extended length. It consists of one
printed circuit board.
Board Size
The real size is 233.35 mm by 280 mm . This is the so called ”Double European Stan-
dard” format with a nominal plug in depth of 280 mm.
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