Example Of Setting An Address; Line Characteristics - HP 5340A Operating And Service Manual

2-34. Example of Setting an Address

2-35. Except for ? and
of Table 2-2 can be used. Selecting a particular listen address will result in a corresponding talk
address or vice versa. For example, if the ASCII
ASCII "C" would be the corresponding talk address. This can be seen in Tables 2-2 and 2-3 and
as follows:
D107 D106 D105 D104
b7
0 1 0
1 0 0
2-36. Note that for a given setting of the address switches, the listen address is determined by
driving D107 to 0 and D106 to 1. The talk address is implemented by driving D107 to 1 and D106
to 0. Table 2-3 lists the available address codes.
2-37. Other examples of 5340A talk listen addresses are as follows:
SETTINGS
0 0 0
0 0 1
0 1 0
1 1 1
1 0 0

2-38. Line Characteristics

2-39. All 15 bus lines are designed to be compatible with n'L or DTL integrated circuits. Since
wire-ANDing is used on some lines, the TTL line drivers must be either open collector or tri-state.
Each line in the 534QA is terminated in a resistor divider consisting of a 3K connected to 5V and a
drivers are open collector NAND gates (SN 7438N or equivalent). These may be put into four
groups:
a. IFC, ATN, and REN are receivers only. They require -3.2 mA maximum at 0.4V to drive.
(underscore), any talk-listen address combination in the shaded areas
symbol is chosen for the listen address, then
D103 D102
0 0 1 1
0 0 1 1
RESULTANT LISTEN
ADDRESS
I
1 1
0 0
0
1
0 0
1
Installation and Remote Programming
BUSDATALINES
ASCIIBITS
LISTEN ADDRESS =
ADDRESS SWITCHES
TALK ADDRESS = C
RESULTANT TALK
ADDRESS
I
<
I
3
SN 7404N
Model 5340A
C
J
2-9