str755fvx STMicroelectronics, str755fvx Datasheet - Page 48

• Manufacturer Part Number: str755fvx
• Description: Arm7tdmi-s, 32-bit Mcu With Flash, Smi, 3 Std 16-bit Timers Pwm Timer, Fast 10-bit Adc, I2c, Uart, Ssp, Usb And Can
• Manufacturer: STMicroelectronics

Electrical parameters
48/71
PLL characteristics
Subject to general operating conditions for V
Table 23.
1. Data based on product characterisation, not tested in production.
2. Refer to jitter terminology in
3. The jitter specification holds true only up to 50mV (peak-to-peak) noise on V
4. The PLL parameters (MX1, MX0, PRESC1, PRESC2) must respect the constraints described
Internal RC Oscillators (FREEOSC & LPOSC)
Subject to general operating conditions for V
Table 24.
f
f
∆t
∆t
∆t
CK_FREEOSC
CK_LPOSC
JITTER1
JITTER2
JITTER3
f
Jitter will increase if the noise is more than 50mV. In addition, it assumes that the input clock has no jitter.
Characteristics on page
Symbol
Symbol
PLL_OUT
f
PLL_IN
t
f
LOCK
VCO
(2)(3)
(2)(3)
(2)(3)
PLL characteristics
Internal RC Oscillators (FREEOSC & LPOSC)
FREEOSC Oscillator Frequency
LPOSC Oscillator Frequency
PLL input clock
PLL input clock duty cycle
PLL multiplier output clock
VCO frequency range
PLL lock time
Single period jitter (+/-3Σ peak
to peak)
Long term jitter (+/-3Σ peak to
peak)
Cycle to cycle jitter (+/-3Σ peak
to peak)
46.
Parameter
Parameter
: PLL Characteristics on page 46
f
When PLL
operates (locked)
f
V
f
V
f
V
DD_IO
DD_IO
PLL_IN
PLL_IN
PLL_IN
PLL_IN
Test Conditions
DD_IO
DD_IO
DD_IO
Conditions
, and T
, and T
x 24
= 4 MHz
= 4 MHz
= 4 MHz
is stable
is stable
is stable
for details on how jitter is specified.
A
A
.
.
(4)
(4)
(4)
Min
150
3
Min
336
40
DDA_PLL
Typ
300
5
Typ
Value
4.0
and V
18
Max
500
Max
+/-250
+/-500
+/-2.5
8
supplies.
165
960
300
in: PLL
60
(1)
STR750F
MHz
Unit
kHz
Unit
MHz
MHz
MHz
µs
ps
ns
ps
%