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25
Data Device Corporation
www.ddc-web.com
BU-61582
G-08/02-250
HOST
SP'ACE
55
55
8
7
5
4
1
2
3
CH. A
TX/RXA
55
55
8
7
5
4
1
2
3
CH. B
TX/RXB
RTAD4-RTAD0
RT
ADDRESS,
PARITY
RTADP
D15-D0
+5V
-12V/-15V
CLK IN
16 MHz
CLOCK
OSCILLATOR
N/C
POLARITY_SEL
(NOTE 2)
ZERO_WAIT
(NOTE 3)
ADDRESS
DECODER
SELECT
MEM/REG
RD/WR
STRBD
READYD
TAG_CLK
RD/WR
CPU STROBE
CPU ACKNOWLEDGE
(NOTE 4)
RESET
NOTES:
+5V
MSTCLR
SSFLAG/EXT_TRIG
INT
CPU INTERRUPT REQUEST
3. ZERO_WAIT SHOULD BE STRAPPED TO
LOGIC "1" FOR NON-ZERO WAIT INTERFACE
AND TO LOGIC "0" FOR ZERO WAIT INTERFACE.
4. CPU ACKNOWLEDGE PROCESSOR INPUT ONLY
FOR NON-ZERO WAIT TYPE OF INTERFACE.
1. CPU ADDRESS LATCH SIGNAL PROVIDED BY
PROCESSORS WITH MULTIPLEXED ADDRESS/DATA
BUSES.
2. IF POLARITY_SEL = "1", RD/WR IS HIGH TO READ,
LOW TO WRITE.
IF POLARITY_SEL = "0", RD/WR IS LOW TO READ,
HIGH TO WRITE.
A15-A12
A11-A0
N/C
ADDR_LAT
TRANSPARENT/BUFFERED
CPU ADDRESS LATCH (NOTE 1)
+5V
16/8_BIT
TRIGGER_SEL
MSB/LSB
+5V
FIGURE 9. 16-BIT BUFFERED MODE