Version 1.3
Page 33 of 36
SMT332/372 User Manual
SDB
The FIFO data is input via a connector known as the Sundance Digital Bus
(SDB). This is a 40 pin connector suitable for connection with ribbon cables.
The pin-out of this header is given here.
Function
Pin
Pin
Function
GND
2
1
WCLK
GND
4
3
DIN0
GND
6
5
DIN1
GND
8
7
DIN2
GND
10
9
DIN3
GND
12
11
DIN4
GND
14
13
DIN5
GND
16
15
DIN6
GND
18
17
DIN7
GND
20
19
DIN8
GND
22
21
DIN9
GND
24
23
DIN10
GND
26
25
DIN11
GND
28
27
DIN12
GND
30
29
DIN13
GND
32
31
DIN14
GND
34
33
DIN15
GND
36
35
FLAG
GND
38
37
WEN
GND
40
39
RESET
The SMT332/372 has two SDB connectors. FIFO channel A uses connector
labelled HDR1, and channel B uses HDR2.
RESET and WEN are active low.
RESET will cause a partial FIFO reset only. It will not alter the programmable
flag positions.
WEN must be active for data to be written into the FIFO.
DIN0 is the lsb. The data (DIN15:0) must have setup and hold times of 4ns
with respect to the rising edge of WCLK.
The standard header used on the top side of the PCB is made by ODU. The
part number for this header is: 515-568-035-040-000. The mating IDC socket
part number is 525.060.035.040.000.