AZPB70 Datasheet, PDF (8/15 Pages) Arizona Microtek, Inc – Programmer Board Kit for AZT70/71

Arizona Microtek, Inc.
AZPB70
Programmer Board for AZT70/71
PROGRAMMING THE AZT70/71
Programming the AZT70/71 is a simple procedure using the included software and programmer board. The
following sections describe the internal functions of the software and programmer board in detail.
CONTROL WORD
The capacitance in the AZT70/71 is controlled by an 11-bit shift register with the data input bit definitions shown in Table
3 and Table 4. The control word data is inputted serially on the rising edge of the CLK signal with bit0 first and bit10 last.
Table 3 - AZT70 Control Word Definition
bit10
Not Used
bit9
Not Used
11-bit Control Word
bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1
C_mid
C_lo
MSB --- LSB MSB --- ---
--- LSB
bit0
Not Used
Table 4 - AZT71 Control Word Definition
11-bit Control Word
bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1
C_hi
C_mid
C_lo
MSB
LSB MSB
---
LSB MSB
---
---
---
LSB
bit0
Not Used
The control word mapping is binary weighted for each of C_hi, C_mid and C_lo where higher number bits are more significant.
Figure 10 shows the capacitance value mapping for the AZT70. The detailed Nominal Capacitance Binary Mapping for
both the AZT70 and AZT71 can be located on the AZM website.
www.azmicrotek.com
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May 2012, Rev 1.2