UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 168

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Figure 89. External Clock Cycle
Figure 90. Recommended Oscillator Circuits
Note: C1, C2 = 30pF ± 10pF for crystals
Figure 91. PSD MODULE AC Measurement I/O
Waveform
Table 140. Capacitance
Note: 1. Sampled only, not 100% tested.
168/175
Symbol
C
For ceramic resonators, contact resonator manufacturer
Oscillation circuit is designed to be used either with a ceramic resonator or crystal oscillator. Since each crystal and ceramic resonator
have their own characteristics, the user should consult the crystal manufacturer for appropriate values of external components.
C
2. Typical values are for T
OUT
3.0V
IN
0V
Input Capacitance (for input pins)
Output Capacitance (for input/
output pins)
Test Point
Parameter
A
= 25°C and nominal supply voltages.
1.5V
AI03103b
Test Condition
V
V
OUT
IN
Figure 92. PSD MODULE AC Measurement
Load Circuit
= 0V
= 0V
Under Test
(1)
Device
Typ.
4
8
(2)
2.01 V
195
C
(Including Scope and
Jig Capacitance)
L
= 30 pF
Max.
12
6
AI03104b
Unit
pF
pF