PT8146 Datasheet, PDF (6/27 Pages) Princeton Technology Corp – 8-Bit 12-Ch I/O DAC

8-Bit 12-Ch I/O DAC
3. SETTING DATA
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URL: http://www.princeton.com.tw
PT8146
DON’T CARE/SPECIAL FUNCTION (CHANNEL SELECT = “0000”)
DF DE DD DC DB DA D9 D8 D7 D6 D5 D4
Function
x x x x x x x x 0 0 0 0 Don’t care
to to to to to to to to to to to to Don’t care
x x x x x x x x 1 0 1 1 Don’t care
0 0 0 0 0 0 0 0 1 1 0 0 GND (all channels)
0 0 0 0 0 0 0 1 1 1 0 0 VDD/256 x 1 (all channels)
0 0 0 0 0 0 1 0 1 1 0 0 VDD/256 x 2 (all channels)
to to to to to to to to to to to to to
1 1 1 1 1 1 1 0 1 1 0 0 VDD/256 x 254 (all channels)
1 1 1 1 1 1 1 1 1 1 0 0 VDD/256 x 255 (all channels)
x x x x x x x x 1 1 0 1 Hi-Z (I/O expander state)*
x x x x x x x x 1 1 1 0 Reset (state when power is ON)
x x x x x x x x 1 1 1 1 Don’t care
x: Don’t care
*: Hi-Z output on all channels of AO5 through AO12
D/A CONVERTER (CHANNEL SELECT = “0001” TO “1100”)
DF DE DD DC DB DA D9 D8 D7 D6 D5 D4
Function
0 0 0 0 0 0 0 0 0 0 0 0 GND
0 0 0 0 0 0 0 1 0 0 0 0 VDD/256 x 1
0 0 0 0 0 0 1 0 0 0 0 0 VDD/256 x 2
0 0 0 0 0 0 1 1 0 0 0 0 VDD/256 x 3
to to to to to to to to to to to to to
1 1 1 1 1 1 0 1 0 0 0 0 VDD/256 x 253
1 1 1 1 1 1 1 0 0 0 0 0 VDD/256 x 254
1 1 1 1 1 1 1 1 0 0 0 0 VDD/256 x 254
x x x x x x x x 0 0 0 1 Hi-Z (I/O expander state)*
x x x x x x x x 0 0 1 0 Don’t care
to to to to to to to to to to to to Don’t care
x x x x x x x x 1 1 1 1 Don’t care
x: Don’t care
*: Only AO5 through AO12 output is valid
PT8146 V1.1
-6-
February, 2006