Data Sheet ADV3205
Rev. 0 | Page 9 of 20
TRUTH TABLE AND LOGIC DIAGRAM
Table 8. Operation Truth Table
1
CE
UPDATE
CLK DATA IN DATA OUT
RESET
SER
/PAR
Operation/Comment
1 X X X X X X No change in logic.
0 1
↓
2
Data
i
Data
i-80
1 0
The data on the serial DATA IN line is loaded into the serial
register. The first bit clocked into the serial register appears at
DATA OUT 80 clocks later.
0 1
↓
3
D0 ... D4,
A0 ... A3
Not
applicable
in parallel
mode
1 1
The data on the parallel data lines, D0 to D4, are loaded into
the 80-bit serial shift register location addressed by A0 to A3.
0 0 X X X 1 X
Data in the 80-bit shift register transfers into the parallel
latches that control the switch array. Latches are transparent.
X X X X X 0 X
Asynchronous operation. All outputs are disabled. Remainder
of logic is unchanged.
1
X = don’t care, 0 = logic low, 1 = logic high, and ↓ = falling edge triggered.
2
↓ = falling edge triggered.
3
↓ = low level triggered.
D
CLK
Q
4 TO 16 DECODER
A0
A1
A2
CLK
16
256
DATA IN
(SERIAL)
(OUTPUT
ENABLE)
SER/PAR
CE
UPDATE
OUT00 EN
DATA
OUT
PARALLEL
DATA
D
Q
CLK
D
Q
CLK
D
Q
CLK
D
Q
CLK
D1
D2
D3
D
Q
CLK
D
Q
CLK
D
Q
CLK
D
Q
CLK
D
Q
CLK
OUT01 EN
OUT02 EN
OUT03 EN
OUT04 EN
OUT05 EN
OUT06 EN
OUT07 EN
D
LE
QCLR
OUT15
EN
OUTPUT ENABLE
SWITCH MATRIX
S
D1
Q
D0
D0
S
D1
Q
D0
S
D1
Q
D0
S
D1
Q
D0
S
D1
Q
D0
S
D1
Q
D0
S
D1
Q
D0
S
D1
Q
D0
D
Q
CLK
S
D1
Q
D0
D4
DECODE
D
LE
QCLR
OUT00
EN
D
LE
OUT00
B0
Q
D
LE
Q
OUT00
B1
D
LE
Q
OUT00
B2
D
LE
Q
OUT00
B3
D
LE
OUT01
B0
Q
D
LE
QCLR
OUT14
EN
D
LE
OUT15
B0
Q
D
LE
OUT15
B1
Q
D
LE
OUT15
B2
Q
D
Q
CLK
S
D1
Q
D0
S
D1
Q
D0
D
LE
OUT15
B3
Q
S
D1
Q
D0
OUT08 EN
OUT09 EN
OUT10 EN
OUT11 EN
OUT12 EN
OUT13 EN
OUT14 EN
OUT15 EN
A3
OUTPUT
ADDRESS
RESET
(OUTPUT ENABLE)
10342-005
Figure 6. Logic Diagram