2-8
2
2.6
LED HEADER (J4)
The N4865A has an internal header for driving external LEDs. The N4865A
provides 5 Vdc to power the external LEDs. User should provide current
limiting resistors to keep the LED current below 10 mA per LED. Cathode
side of the LEDs connects to the N4865A’s active low LED drive signals. J4
pinouts are listed in Table 2-3
TABLE 2-3 LED HEADER PINOUTS (J4)
Pin
Signal
Pin
Signal
1
5 Vdc
6
LSTN
2
RDY
7
SRQ
3
LAN
8
ERROR
4
ACT
9
no connection
5
TALK
10
Ground
+5 (Pin 1)
LED Drive Signal
R > 350 ohms
Figure 2-7 External LED Circuit
Pin
Signal
Pin
Signal
1
5 Vdc
6
LSTN
2
RDY
7
SRQ
3
LAN
8
ERROR
4
ACT
9
no connection
5
TALK
10
Ground
Pin
Signal
Pin
Signal
1
5 Vdc
6
LSTN
2
RDY
7
SRQ
3
LAN
8
ERROR
4
ACT
9
no connection
5
TALK
10
Ground
Pin
Signal
Pin
Signal
1
5 Vdc
6
LSTN
2
RDY
7
SRQ
3
LAN
8
ERROR
4
ACT
9
no connection
5
TALK
10
Ground
Pin
Signal
Pin
Signal
1
5 Vdc
6
LSTN
2
RDY
7
SRQ
3
LAN
8
ERROR
4
ACT
9
no connection
5
TALK
10
Ground
Summary of Contents for N4865A
Page 20: ...1 16 1 This page left intentionally blank ...
Page 32: ...2 12 2 This page left intentionally blank ...
Page 40: ...3 8 3 This page left intentionally blank ...
Page 44: ...4 4 4 This page purposely left blank ...
Page 96: ...A 44 A2 This page purposely left blank ...
Page 100: ...Index 4 I This page left intentionally blank ...