Maintenance—2246 1Y and 2246 Mod A Service
Table 6-8
Measurem ent Processor I/O M em ory Map
Address range (A19
1^-_____
D irto rw
- A0)
Signal name and
description
Signal
source
0110
0000
0000
o x x x
x x x x
LED CATH CLK —Latches cathode
data to Front-Panel LEDs.
U2501 pin 25
(Diagram 8)
0110
0000
0000
1XXX
x x x x
LED ANODE CLK—Latches anode
data to Front-Panel LEDs.
U2501 pin 27
(Diagram 8)
0110
0000
0001
o x x x
x x x x
RO BUF WR —Latches Readout
Processor control datas.
U2501 pin 28
(Diagram 8)
0110
0000
0001
1XXX
x x x x
RO BUF
R D —
Enables Readout RAM
data onto bus D0-D7 (used for diag
nostics o nly).
U2501 pin 29
(Diagram 8)
0110
0000
0010
o x x x
xooo
DAC LSB CLK —Latches the least
significant byte of data to the D -to -A
Converter.
U2517 pin 14
(Diagram 8)
0110
0000
0010
o x x x
X001
DAC MSB CLK —Latches the most
significant byte of data to the D -to -A
Converter.
U2517 pin 14
(Diagram 8)
0110
0000
0010
o x x x
X010
POT MUX CLK —Latches channel
selection code for pot multiplexer.
U2517 pin 13
(Diagram 8)
100X
x x x x
x x x x
x x x x
xooo
MB CNTL
W R
—Write enables Pro
cessor Interface circuitry (Diagram 4).
U2518 pin 15
(Diagram 8)
100X
0000
x x x x
x x x x
xooo
Sets BEAM FIND (U503 pin 7) high ON.
U503 pin 7
(Diagram 4)
100X
x x x x
x x x x
x x x x
X001
SW BD SR LOAD —Loads column data
into switch board registers.
U2518 pin 14
(Diagram 8)
100X
x x x x
x x x x
x x x x
X010
SW BD SR SHIFT —Shifts data in
switch board registers to the SW
BD DATA signal line.
U2518 pin 13
(Diagram 8)
100X
x x x x
x x x x
x x x x
X011
SLIC WR -W rite to SLIC, U600
Diagram 4.
U2518 pin 12
(Diagram 8)
6-23
Summary of Contents for 2246 1Y
Page 13: ...2246A Service 7062 01 X The 2246 1Y or 2246 Mod A Portable Oscilloscope ...
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Page 278: ...Figure 9 5b Detailed 2246 1Y or 2246 Mod A block diagram part 2 R E ...
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Page 304: ...A D D J U N 1991 ...
Page 311: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 1 0 V r l III B f e I l i 6555 39 ...
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Page 321: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 2 SET READOUT CONTROL CCW OFF 6555 40 ...
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Page 326: ...A B C P E F G ...
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Page 343: ...C l rti ...
Page 347: ...BEV JUNE 1991 7062 18 ...
Page 349: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 6 6555 43 I ...
Page 355: ...I BOARD LOCATION 8K 8J 8H 7H 8H 8H 7J 8D 7H 8H 8J 8J 7K 8K 10D 6L 6K 6L 6K 6G 5H I ...
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Page 372: ...2246 1Y and 2246 Mod A Service WAVEFORMS FOR DIAGRAM 9 MORE ...
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Page 394: ...WAVEFORMS FOR DIAGRAM 12 2246 1Y and 2246 Mod A Service i f I S 1 f c i 4 i ...
Page 395: ...WAVEFORMS FOR DIAGRAM 12 cont 2246 1Y and 2246 Mod A Service ...
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Page 400: ...REV JUNE 1991 7062 39 ...
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