RTC
®
5 PC Interface Board
Rev. 1.9 e
15 Appendix A: The RTC
®
5 PC/104-Plus Board
579
innovators for industry
15.2.2 Interface to the CPU board
Data transfer between the CPU board and the
RTC
®
5 PC/104-
Plus
board is via the PCI bus. The
RTC
®
5 PC/104-
Plus
board provides 120-pin PCI stack-
through connectors (see
). The
timing and signal levels of the PCI signals are in
compliance with PCI Local Bus Specification
Revision 2.2. 64-bit extensions, JTAG, PRSNT and
CLKRUN signals are not supported.
On the ISA bus, the RTC
®
5 PC/104-
Plus
board only
uses the +5 V power provided at pins B3, B29 and
D16 (for more power supply information, also see
). The other signals of the ISA bus are simply
forwarded via the 104-pin ISA stack-through
connectors to further boards in the stack and are not
used by the RTC
®
5 PC/104-
Plus
board.
15.2.3 Master/Slave Synchronization
If multiple synchronously-clocked RTC
®
5 PC/104-
Plus
boards are to be used in a PC/104 stack, then the
RTC
®
5 PC/104-
Plus
boards must be connected
pairwise with each other via the MASTER and SLAVE
connectors and installed in adjacent stack positions.
Always connect a board’s MASTER connector to the
SLAVE connector of another board. Suitable
connection cables are available from SCANLAB.
chapter 6.6.3 "Master/Slave Operation",
"Starting and Stopping Lists via External
Control Signals and Master/Slave Synchronization",
page 209
.
15.2.4 Interfaces to Scan System
For digitally controlling scan systems, the 20-pin
SCANHEADS connector provides the primary scan
head connection (pins 1 through 10) and the
optionally activated secondary scan head connection
(pins 11 through 20) (see
). At
this connector, scan-system control values are trans-
mitted and scan-system status signals received.
shows the pin-out of the SCANHEADS
connector.
The SCANHEADS connector provides the same signals
as the SCAN HEAD and 2. SCAN HEAD connectors of
the RTC
®
5 PC interface board. Scan system control
(via an XY2-100 converter, if needed) is identical to
that of the RTC
®
5 PC interface board. Note the infor-
mation in
chapter 4.3 "Interfaces to Scan System",
Caution!
• The RTC
®
5 PC/104-
Plus
board does not support
power-saving modes that switch off power to
the PCI bus. Accordingly, you must disable
standby or sleep modes of the operating
system. Also see the note on
.
63
DATA IN 1+ (1)
+3.3 V (DO NOT CONNECT) (3)
NOT CONNECTED (5)
NOT CONNECTED (7)
DATA OUT 1+ (9)
DATA IN 2+* (11)
+3.3 V (DO NOT CONNECT) (13)
NOT CONNECTED (15)
NOT CONNECTED (17)
DATA OUT 2+* (19)
(2)
DATA IN 1 –
(4)
GND
(6)
GND
(8)
DATA OUT 1 –
(10) NOT CONNECTED
(12) DATA IN 2 – *
(14) GND
(16) GND
(18) DATA OUT 2 – *
(20) NOT CONNECTED
Pin-out of the SCANHEADS connector
(* Signal only optionally activated)
