UPI-41AH Datasheet, PDF (15/20 Pages) Intel Corporation – UNIVERSAL PERIPHERAL INTERFACE 8-BIT SLAVE MICROCONTROLLER

A C TESTING INPUT OUTPUT WAVEFORM
INPUT OUTPUT
UPI-41AH 42AH
A C TESTING LOAD CIRCUIT
210393 – 14
l6 MHz
DRIVING FROM EXTERNAL SOURCE-TWO OPTIONS
210393 – 15
LC OSCILLATOR MODE
210393 – 16
210393 – 17
Rise and Fall Times Should Not Exceed 10 ns Resis-
tors to V_CC are Needed to Ensure V_IH e 3 5V if TTL
Circuitry is Used
CRYSTAL OSCILLATOR MODE
L
C NOMINAL
45 H 20 pF 5 2 MHz
120 H 20 pF 3 2 MHz
1
fe
2q0LC
C a 3Cpp
Ce
2
Cpp j 5– 10 pF
Pin-to-Pin Capacitance
210393 – 18
Each C Should be Approximately 20 pF including Stray Capacitance
210393 – 19
C1 5 pF (STRAY 5 pF)
C2 (CRYSTAL a STRAY) 8 pF
C3 20 – 30 pF INCLUDING STRAY
Crystal Series Resistance Should
be Less Than 30X at 12 5 MHz
15