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Signal Name
Type Function
TCK
I
TMS
I
TDI
I
TDO
O
RESET*
I
CLK
I
CLK10
I
TIME_CODE_SYNC
I
PLLOUT
O
VCC
GND
SMCS332SpW
User Manual
Test Clock. Provides an asynchronous clock for JTAG
boundary scan.
Test Mode Select. Used to control the test state machine.
Test Data Input. Provides serial data for the boundary scan
logic.
Test Data Output. Serial scan output of the boundary scan
path.
SMCS Reset. Sets the SMCS to a known state. This input
must be asserted (low) at power-up. The minimum width of
RESET low is 5 cycles of CLK10 in parallel with CLK
running.
External clock input to SMCS (max. 25 MHz).
Must be derived from RAM access time.
External clock input to SMCS DS-links (application
specific, nominal 10 MHz). Used to generate to
transmission speed and link disconnect timeout.
A falling edge on this signal sends (if enabled) the internal
SpaceWire time code value over the links.
Output of internal PLL. Used to connect a network of
external RC devices. No PLL clock output!
Power Supply
Ground
– All Rights Reserved – Copyright per DIN 34 –
EADS Astrium GmbH, ASE2
Doc No: SMCS_ASTD_UM_100
Issue:
1.4
Updated: 9-Sep-2006
Page:
66 of 131
max. output
load [pF]
current [mA]
3
50
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