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TPMC632 User Manual Issue 1.0.6
Page 13 of 49
Gigabit Transceiver (GTP)
4.3
The TPMC632 provides one GTP as Spartan-6 PCI Express Endpoint Block.
SI5338
PCIe Clock
Bridge Clock
Spartan-6
G
T
P
1
01
CL
K
0
G
T
P
1
01
CL
K
1
G
T
P
1
23
CL
K
1
P
C
Ie t
o
P
C
I B
ridge
G
T
P
1
23
CL
K
0
100 MHz
125 MHz
P
M
C
-C
onnec
tor
PCIe X1 Interface
PCI Interface
Figure 4-2 : GTP Block Diagram
GTP
Signal
FPGA
Pins
Connected to
MGT0_101
MGTTX
B6 / A6
used for PCI Express
Endpoint Block
MGTRX
D7 / C7
MGT1_101
MGTTX
B8 / A8
not used
MGTRX
D9 / C9
MGT0_123
MGTTX
B14 / A14
not used
MGTRX
D13 / C13
MGT1_123
MGTTX
B16 / A16
not used
MGTRX
D15 / C15
Table 4-3 : GTP Connections
The GTP clock MGT0_101 (PCI Express Endpoint Block clock reference) of 125 MHz is generated by the
SI5338 low-jitter clock generator.
MGT1_101, MGT0_123 and MGT1_123 are not used on the TPMC632.
GTP
Signal
FPGA
Pins
Connected to
MGT0_101
MGTREFCLK
A10 / B10
125 MHz (derived SI5338
clock generator)
MGT1_101
MGTREFCLK
C11 / D11
not used
MGT0_123
MGTREFCLK
A12 / B12
not used
MGT1_123
MGTREFCLK
E12 / F12
not used
Table 4-4 : Multi Gigabit Transceiver Reference Clocks