ST72F321AR9TA STMicroelectronics, ST72F321AR9TA Datasheet - Page 151

• Manufacturer Part Number: ST72F321AR9TA
• Description: IC MCU 8BIT 60KB FLASH 64-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F321AR9TA

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

CLOCK CHARACTERISTICS (Cont’d)
Note:
1. Data based on characterization results.
12.5.5 PLL Characteristics
Note:
1. Data characterized but not tested.
The user must take the PLL jitter into account in the application (for example in serial communication 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 80
cies of less than 125KHz, the jitter is negligible.
Figure 80. Integrated PLL Jitter vs signal frequency
Note 1: Measurement conditions: f
+/-Jitter (%)
f
Δ f
OSC
Symbol
CPU
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
/ f
0
CPU
shows the PLL jitter integrated on application signals in the range 125kHz to 4MHz. At frequen-
4 MHz
PLL input frequency range
Instantaneous PLL jitter
2 MHz
Parameter
Application Frequency
1 MHz
1)
CPU
500 kHz
= 8MHz.
f
f
OSC
OSC
= 4 MHz.
= 2 MHz.
250 kHz
Conditions
1
ST72321Rx ST72321ARx ST72321Jx
Min
2
Typ
1.0
2.5
Max
2.5
4.0
4
151/193
MHz
Unit
%