AZPB70 Datasheet, PDF (10/15 Pages) Arizona Microtek, Inc – Programmer Board Kit for AZT70/71

Arizona Microtek, Inc.
AZPB70
Programmer Board for AZT70/71
DA
Programming
Board CLK
(AZPB70)
PV
VDD
DA
AZT70/71 X₁
CLK
PV
VSS
OUT
RESONATOR
OSCILLATOR
Figure 11 – AZT70/71 in Programming Mode
NC
VDD
DA
AZT70/71 X₁
NC
CLK
NC
PV
VSS
OUT
RESONATOR
OSCILLATOR
Figure 12 – AZT70/71 in Operational Mode
PROGRAMMING MODES
The AZT70/71 has two capacitance setting modes from which bits are set and the matching capacitors are selected. Note
that all the following described operations can be simply controlled through the included software and programmer
board detailed previously.
• Reading directly from the shift register
o This is useful for testing the capacitance and subsequent oscillator frequency. This mode is active after
the last bit is shifted in and when the CLK pin is left logic high. For the shift register, capacitors are
selected when bits are active HIGH.
• Reading from the value contained in the EEPROM
o Prevents customer adjustment and retains factory programming and is active when the CLK pin is at logic
low or not connected. For the EEPROM, capacitors are selected when bits are active LOW.
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May 2012, Rev 1.2