Measurement Processor I/O Memory M A P - Tektronix 2246 1Y Service Manual

Address range (A19 - A0)
1^-_____ D irto rw
o x x x
0110 0000 0000
0110 0000 0000 1XXX
o x x x
0110 0000 0001
0110 0000 0001 1XXX
o x x x
0110 0000 0010
o x x x
0110 0000 0010
o x x x
0110 0000 0010
x x x x x x x x x x x x
100X
100X x x x x x x x x
0000
x x x x x x x x x x x x
100X
100X x x x x x x x x x x x x
x x x x x x x x x x x x
100X
Table 6-8
Measurement Processor I/O M em ory Map
Signal name and
x x x x
LED CATH CLK —Latches cathode
data to Front-Panel LEDs.
x x x x
LED ANODE CLK—Latches anode
data to Front-Panel LEDs.
x x x x
RO BUF WR —Latches Readout
Processor control datas.
x x x x
RO BUF Enables Readout RAM
R D —
data onto bus D0-D7 (used for diag­
nostics only).
xooo
DAC LSB CLK —Latches the least
significant byte of data to the D -to -A
Converter.
X001
DAC MSB CLK —Latches the most
significant byte of data to the D -to -A
Converter.
X010
POT MUX CLK —Latches channel
selection code for pot multiplexer.
xooo
MB CNTL
W R
cessor Interface circuitry (Diagram 4).
xooo
Sets BEAM FIND (U503 pin 7) high ON.
X001
SW BD SR LOAD —Loads column data
into switch board registers.
X010
SW BD SR SHIFT —Shifts data in
switch board registers to the SW
BD DATA signal line.
X011
SLIC WR -W rite to SLIC, U600
Diagram 4.
Maintenance—2246 1Y and 2246 Mod A Service
description
—Write enables Pro­
Signal
source
U2501 pin 25
(Diagram 8)
U2501 pin 27
(Diagram 8)
U2501 pin 28
(Diagram 8)
U2501 pin 29
(Diagram 8)
U2517 pin 14
(Diagram 8)
U2517 pin 14
(Diagram 8)
U2517 pin 13
(Diagram 8)
U2518 pin 15
(Diagram 8)
U503 pin 7
(Diagram 4)
U2518 pin 14
(Diagram 8)
U2518 pin 13
(Diagram 8)
U2518 pin 12
(Diagram 8)
6-23