Echelon Series 6000 Chip databook - Manual (Page 169)

Memory Interface Connections
Figure 61 shows the connections for the serial memory interface. The figure shows
connections to a a flash memory device. The 49.9 Ohm series resistors are not generally
needed, and can be omitted. The 100k Ohm pulldown on MISO can also be omitted.
Figure 61. Memory Interface Connections
Transformer Connections
Figure 62 shows the connections for the communications transformer. The figure shows
connections for both the FT-X2 Communication Transformer and the FT-X3 Communications
Transformer. Your PCBA would include only an FT-X2 or an FT-X3. The capacitors C19
and C20 are generally not needed to pass EMC testing, and can be omitted.
NETP
C15
56pF
50V
0603
1
2
P1
P2 S1
S2
T2
FT-X3
1
6
4
3
8
7
2
5
C19
0603
NO LOAD
1
2
NETB
NETA
T1
FT-X2
NO LOAD
5
6
2
1
CTP
C20
0603
NO LOAD
1
2
CTS
D2B
BAV99
75V 3
2
VDD_3V3
NETB
C16
0.1uF
16V
0603
1
2
VDD_3V3 VDD_3V3
NETA
D1B
BAV99
75V
3
2
C14
56pF
50V
0603
1
2
D1A
BAV99
75V 1
3
NETN
D2B
BAV99
75V
3
2
Figure 62. Transformer Connections
I/O and Network Connections
Figure 63 shows the basic I/O connections and the network connections. The figure does not
show external I/O devices, and thus does not include pull-up or pull-down resistors for the
IO0..IO11 signals.
Series 6000 Chip Data Book 157