Maintenance—2230 Service
OUT_PORTS. All microprocessor output ports of the
instrument are exercised by this exerciser. If entered from
the menu, rotating the cursor knob selects either a single
port or all ports at once. If entered from power-up, the
exerciser is run with the box display. Test patterns used in
each port are shown in Table 6-18 through Table 6-22.
NOTE
The ones and zeros patterns are observed using an
LED dip dip on the registers. The pattern seen on
Address Counters U3423, U3424, and U3425
(U3427 and U3428) will occasionally have other data
superimposed upon it.
Table 6-18
ACQ_MEM 0x48000
U3427 Pins
23456789
U3428 Pins
23456789
000x0000
OOOOxxxx
001x0000
OOOOxxxx
010x0000
OOOOxxxx
1 0 0 x 0 0 0 0
OOOOxxxx
000x1000
OOOOxxxx
000x0100
OOOOxxxx
0 0 0 x 0 0 1 0
OOOOxxxx
000x0001
OOOOxxxx
000x0000
1 0 0 0 x x x x
000x0000
01OOxxxx
000x0000
0 0 1 0 x x x x
000x0000
0 0 0 1 x x x x
000x0000
OOOOxxxx
001x0000
OOOOxxxx
Table 6-19
ACQ_MODE 0x437BE
U3310 Pins
2
3
4 5
6
7
8 9
0
0
0 0
0 0
0 0
1
0
0 0
0 0
0
1
0 1 0 0
0
0
1 0
0
0
1 0
0
1
0 0
0
0
0
1
1 0
0
0
0
0
0 0
0 0
0
0
1
0 0 0
0
0
0
1
Table 6-20
TB_MODE 0x407DE
2
3
4
U4119 Pins
5 6
7
8
9
0
0
0
0
0
0
0
0
0 0
0
1 1 0
0
0
0
0
1
0 0
1 0
0
0
1 0
0 0
0
1
0
1 0
0
0 0
0
0
1
0
0
0
0 0
0
0 0
0
0 0
1 1
0 0
0
TB.
Table 6-21
_SWP_RATE 0x407EE
U4113 Pins
2 3
4
5 6
7
8 9
0
0
0
0 0
0
0 0
0 0
0
1
1 0
0
0
0
0
1
1 1
1
0 0
0
1
1
1 1
1
1
0
1
1 1
1
1
1
1 1
0 0
0
0
0
0
0
0
0
0
0
1 1
0
0 0
Table 6-22
FP_A/D_CTL 0X437F6
2 3
U6104 Pins
4 5 6 7
8
9
1
1 1
1
1
1
1 1
1
1 0
1 1
1
1
1
1
1 0
0
1
1
1
1
1
1 0
0 0
1
1
1
1
1 0
0 0
0
1
1
1
1 0
0
0
0
0
1
1
1
0
0 0
0
0
0
0
1
0
0
0
0
0
0
0 0
0
0
0
0
0
0
1
1 1
1
1
1
1
1
1 1
0
1
1
1
1
1
6-29
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