Texas Instruments THS1030/31EVM, Руководство пользователя

Страница: 30 / 39

Circuit Function
3-8
Table 3–1. Output Connector J4
J4 Pin Output Function J4 Pin Output Function
1 GND 21 I/O9 DATA
2 NC 22 GND
3 GND 23 I/O8 DATA
4 NC 24 GND
5 GND 25 I/O7 DATA
6 NC 26 GND
7 GND 27 I/O6 DATA
8 GND 28 GND
9 CLK CLK 29 I/O5 DATA
10 GND 30 GND
11 GND 31 I/O4 DATA
12 GND 32 GND
13 GND 33 I/O3 DATA
14 GND 34 GND
15 GND 35 I/O2 DATA
16 GND 36 GND
17 OVR OVR 37 I/O1 DATA
18 GND 38 GND
19 GND 39 I/O0 DATA
20 GND 40 GND
3.2.6 THS1031 Register Write
The THS1031 has a number of registers that can be written to put the device
into various modes of operation (see data sheet). This can be accomplished
easily on the EVM using the two banks of DIL switches SW3 and SW4. A write
operation to the THS1031 is performed as follows :
1) Set the DIL switches to the value to be programmed into the THS1031 reg-
isters. Each DIL switch refers to a register bit in either clamp register1,
clamp register2, or in the control register. DAC0 DIL switch refers to bit 0
of clamp register1, BIN2O DIL switch refers to bit 5 of the control register.
A DIL switch in the
on position represents a logic 1.
2) Press and release the push button switch SW1.
3) The THS1031 registers are now programmed with the DIL switch values.
Note:
After first application of power, the values on the DIL switches only represent
what is programmed into the THS1031 after switch SW1 has been pressed.
Prior to this, the device is in its default power-up state.