12
nanoseconds. This is reduced to less than 1 nanosecond in the TM1300 when the
improved mode is used. In TM1300 improved mode, the frequency resolution is 0.3 Hz.
3.
General-Purpose Outputs
Four general purpose static outputs (GPOUT0-3) are provided to connector J1A/J1B.
These RS422 differential outputs can be written out through the UART by the primary
TriMedia (via the I
2
C bus).
D. Digital Input Connector (J1A/J1B)
The Digital Input connector is on the Rear PCI Bracket: JA1/J1B is a Dual 68-Pin Connector,
with 32-bit Digital Inputs and Control (Table 6). Digital signals are differential, consisting of a
positive and a negative signal pair; in the table, they are combined (e.g., differential signals
Tap1_LVALP and Tap1_LVALN* are shown as just Tap1_LVAL). The positive signal is
always the lower-numbered pin in each pair; the negative signal is the higher-numbered pin.
J1A/J1B
Pins
J1A Signal
J1B Signal
J1A/J1B
Pins
J1A Signal
J1B Signal
1,2
Tap1_LVAL
Tap3_LVAL
35, 36
STROBE_1
STROBE_3
3, 4
Tap1_FVAL
Tap3_FVAL
37, 38
STROBE_2
STROBE_4
5, 6
Tap1_PXCK
Tap3_PXCK
39, 40
MASTER_CK1
MASTER_CK3
7, 8
GPIN1
GPIN3
41, 42
MASTER_CK2
MASTER_CK4
9
GND
GND
43
GND
GND
10, 11
Tap1_D0
Tap3_D0
44, 45
Tap2_D7
Tap4_D7
12, 13
Tap1_D1
Tap3_D1
46, 47
Tap2_D6
Tap4_D6
14, 15
Tap1_D2
Tap3_D2
48, 49
Tap2_D5
Tap4_D5
16, 17
Tap1_D3
Tap3_D3
50, 51
Tap2_D4
Tap4_D4
18, 19
Tap1_D4
Tap3_D4
52, 53
Tap2_D3
Tap4_D3
20, 21
Tap1_D5
Tap3_D5
54, 55
Tap2_D2
Tap4_D2
22, 23
Tap1_D6
Tap3_D6
56, 57
Tap2_D1
Tap4_D1
24, 25
Tap1_D7
Tap3_D7
58, 59
Tap2_D0
Tap4_D0
26
GND
GND
60
GND
GND
27, 28
EXT_TRIG1
EXT_TRIG2
61, 62
GPIN2
GPIN4
29, 30
GPIN5
GPIN6
63, 64
Tap2_LVAL
Tap4_LVAL
31, 32
GPOUT1
GPOUT3
65, 66
Tap2_FVAL
Tap4_FVAL
33, 34
GPOUT2
GPOUT4
67, 68
Tap2_PXCK
Tap4_PXCK
Table 5. Analog and Digital Input Connector J1A/J1B
E. Digital Input Cables
1.
Alacron Digital Input Cable
The Alacron Digital Input Cable 10024-00161 is a Y cable with one 68-pin connector
(Cable-P1) and two 37-pin female DSUB37 connectors (Cable-P2 on the direct cable to
Cable-P1 and Cable-P3 at the end of the Y). Cable-P1 mates with one of the 68-pin sides
on the dual 68-pin connector (J1A/J1B). Tables 1 and 2 show the signals at the pins of P2
and P3 (respectively) when connected to either J1A or J1B. Each digital input signal is a
differential pair. The positive-true signal has suffix P; the negative-true signal has suffix N.
