STEVAL-ISQ002V1 STMicroelectronics, STEVAL-ISQ002V1 Datasheet - Page 139

• Manufacturer Part Number: STEVAL-ISQ002V1
• Description: BOARD EVAL BASED ON ST72264G1
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISQ002V1

• Main Purpose: Interface, PMBus
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST72F264
• Primary Attributes: The PMBus™ Interface Using the ST7 I2C Peripheral
• Secondary Attributes: Firmware in C Language
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6423

CLOCK CHARACTERISTICS (Cont’d)
13.5.5 PLL Characteristics
Note:
1. Data characterized but not tested.
Figure 74. PLL Jitter vs. Signal frequency
Note 1: Measurement conditions: f
V
f
∆ f
OSC
DD(PLL)
Symbol
CPU
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
/f
CPU
2000
PLL Operating Range
PLL input frequency range
Instantaneous PLL jitter
Application Signal Frequency (KHz)
1000
Parameter
500
250
CPU
1)
PLL ON
PLL OFF
= 4MHz, T
125
T
T
f
f
OSC
OSC
A
A
1
0 to 70
-40 to +85
= 4 MHz.
= 2 MHz.
A
Conditions
= 25°C
°C
°C
The user must take the PLL jitter into account in
the application (for example in serial communica-
tion or sampling of high frequency signals). The
PLL jitter is a periodic effect, which is integrated
over several CPU cycles. Therefore the longer the
period of the application signal, the less it will be
impacted by the PLL jitter.
Figure 74
cation signals in the range 125kHz to 2MHz. At fre-
quencies of less than 125KHz, the jitter is negligi-
ble.
ST72260Gx, ST72262Gx, ST72264Gx
shows the PLL jitter integrated on appli-
Min
3.5
4.5
2
Typ
1.0
2.5
Max
5.5
5.5
2.5
4.0
4
139/172
MHz
Unit
%
%
V