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2x ESMT M12L16161A-5T 1M x 16bit 200MHz SDRAMs (organized as 1M x 32bit) (datasheet)
or
2x WinBond W9816G6JH-6 1M x 16bit 166MHz SDRAMs (organized as 1M x 32bit)
(datasheet)
12x 74HC245T Octal Bidirectional Transceiver (used for level translation to 5V)
PCB overview
Definitions
Power
JTAG
JTAG is available on a 4-pin header next to the FPGA (U33). VCC/GND are available on a 2-pin header nearby.
Pin
Function
J27
TCK
J31
TMS
J32
TDI
J30
TDO
J33
3.3V
J34
GND
SPI Flash
Connections
Clock
A 25MHz clock is available at FPGA pin P6, and is also connected to both PHYs.
SDRAM, U29
U29 Pin
FPGA Pin
DQ0
B13
DQ1
C11
DQ2
C10
DQ3
A11
DQ4
C9
DQ5
E8
DQ6
B6
DQ7
B9
DQ8
A6
DQ9
B5
DQ10
A5
DQ11
B4
DQ12
B3
DQ13
C3
DQ14
A2
DQ15
B2
A0
A9
A1
E10
A2
B12
A3
D13
A4
C12
A5
D11
A6
D10
A7
E9
A8
D9
A9
B7
A10/AP
C8
BA
A7
LDQM
GND
UDQM
GND
CLK
C6
CKE
3.3V
~CS
GND
~RAS
D7
~CAS
E7
~WE
C7
SDRAM, U32
U32 Pin
FPGA Pin
DQ0
E2
DQ1
D3
DQ2
A4
DQ3
E4
DQ4
D4
DQ5
C4
DQ6
E5
DQ7
D5
DQ8
E6
DQ9
D6
DQ10
D8
DQ11
A8
DQ12
B8
DQ13
B10
DQ14
B11
DQ15
E11
A0
A9
A1
E10
A2
B12
A3
D13
A4
C12
A5
D11
A6
D10
A7
E9
A8
D9
A9
B7
A10/AP
C8
BA
A7
LDQM
GND
UDQM
GND
CLK
C6
CKE
3.3V
~CS
GND
~RAS
D7
~CAS
E7
~WE
C7
PHY0, U3
U3 Pin
FPGA Pin
GTXCLK
M2
TXD[0]
L1
TXD[1]
L3
TXD[2]
P2
TXD[3]
L4
TX_EN
M3
RXC
M1
RXD[0]
N1
RXD[1]
M5
RXD[2]
N5
RXD[3]
M6
RXD_DV
N6
MDC
P3
MDIO
T2
~RESET
P5
PHY1, U7
U7 Pin
FPGA Pin
GTXCLK
M12
TXD[0]
T14
TXD[1]
R12
TXD[2]
R13
TXD[3]
R14
TX_EN
R15
RXC
M16
RXD[0]
P13
RXD[1]
N13
RXD[2]
P14
RXD[3]
M15
RXD_DV
L15
MDC
P3
MDIO
T2
~RESET
P5
Buffers
Buffer U18_B2, U18_B3, U21_B2, U21_B3 are not connected to any Jx connectors.
LED, Button
There is a general purpose, FPGA controlled LED (DATA_LED-) at P11, active low (FPGA pin should be set to open drain).
Additionally, there is a button (J28, KEY+). When M13 is an input, pressing the button will read low, otherwise it will read high.