Atmel SpaceWire Router SpW-10X - Manual (Page 126)

Ref.: UoD_SpW-10X_
UserManual
Issue: 3.4
SpW-10X
SpaceWire Router
User Manual Date: 11 th
July 2008
Preliminary
126
Table 9-15 Transmit Clock Control Register Bits
Bits Name Reset Value Description Read/Write
1:0 TXDIV “01” Transmit clock internal PLL output
divider. Selects the divided output from
the transmit clock as follows
“00” Æ divide by 2
“01” Æ divide by 4
“10” Æ divide by 8
“11” Æ divide by 8
Example : If the PLL output frequency is
200MHz (set by FEEDBDIV, see section
5.1) and TXDIV = 01 then the transmit
clock frequency will be 50MHz and the
transmit data rate will be 100Mbit/s
R/W
7:2 Not used All bits set to zero - R
15:8 Enable clock All bits set to 1 Enable the transmit clock trees. Setting a
bit to zero disables the transmit clock for
the corresponding SpaceWire port, i.e.
clearing bit 8 causes the transmit clock
for SpaceWire port 1to be stopped. R/W
20:16 Tx10MbitDIV Dependent on
FEEDBDIV at reset
FEEDBDIV= “000”
Æ “00100”
FEEDBDIV= “001”
Æ “00101”
FEEDBDIV= “010”
Æ “00110”
FEEDBDIV= “011”
Æ “00111”
FEEDBDIV= “100”
Æ “01000”
FEEDBDIV= “101”
Æ “01001”
FEEDBDIV= “110”
Æ “01001”
FEEDBDIV= “111”
Æ “01001”
Set the default 10Mbit/s data rate divider
value. The Tx10MbitDIV value should be
set as described in section 8.1.6. R/W
31:21 Not used All bits set to zero - R