STM32F407ZG STMicroelectronics, STM32F407ZG Datasheet - Page 87

• Manufacturer Part Number: STM32F407ZG
• Description: High-performance and DSP with FPU, ARM Cortex-M4 MCU with 1 Mbyte Flash, 168 MHz CPU, Art Accelerator, Ethernet
• Manufacturer: STMicroelectronics

Specifications of STM32F407ZG

• Core: ARM 32-bit Cortex™-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory, frequency up to 168 MHz, memory protection unit, 210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions
• 3×12-bit, 2.4 Msps A/d Converters: up to 24 channels and 7.2 MSPS in triple interleaved mode
• General-purpose Dma: 16-stream DMA controller with FIFOs and burst support
• Up To 17 Timers: up to twelve 16-bit and two 32-bit timers up to 168 MHz, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
• 10/100 Ethernet Mac With Dedicated Dma: supports IEEE 1588v2 hardware, MII/RMII
• Rtc: subsecond accuracy, hardware calendar

STM32F405xx, STM32F407xx
Note:
Caution:
Table 29.
1. Based on characterization, not tested in production.
2. TBD stands for “to be defined”.
3. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator
4. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
5. t
For C
5 pF to 15 pF range selected to match the requirements of the crystal or resonator (see
Figure
specifies a load capacitance which is the series combination of C
Load capacitance C
C
between 2 pF and 7 pF.
To avoid exceeding the maximum value of C
to use a resonator with a load capacitance C
capacitance of 12.5 pF.
Example: if you choose a resonator with a load capacitance of C
then C
Figure 30. Typical application with a 32.768 kHz crystal
t
SU(LSE)
Symbol
stray
design guide for ST microcontrollers”.
small R
32.768 kHz oscillation is reached. This value is measured for a standard crystal resonator and it can vary
significantly with the crystal manufacturer
C
SU(LSE)
R
g
I
(3)
2
m
F
L1
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
L1
Resonator with
integrated capacitors
30). C
(5)
and C
S
= C
is the startup time measured from the moment it is enabled (by software) to a stabilized
value for example MSIV-TIN32.768kHz. Refer to crystal manufacturer for more details
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal (R
LSE driving current
Oscillator Transconductance
startup time
LSE oscillator characteristics (f
L2
L1
L2
= 8 pF.
and C
C L2
C L1
it is recommended to use high-quality external ceramic capacitors in the
L
Parameter
has the following formula: C
L2,
32.768 kH z
resonator
are usually the same size. The crystal manufacturer typically
Doc ID 022152 Rev 2
OSC32_OU T
OSC32_IN
S
)
(4)
V
R F
DD
L1
L
V
≤
= 3.3 V, V
DD
LSE
and C
Conditions
R
controlled
S
7 pF. Never use a resonator with a load
is stabilized
L
Bias
gain
= 30 kΩ
= 32.768 kHz)
= C
L2
L1
IN
(15 pF) it is strongly recommended
= V
x C
SS
L2
STM32F
/ (C
TBD
Electrical characteristics
Min
L
L1
f LSE
(1)(2)
-
-
-
-
= 6 pF, and C
L1
and C
+ C
TBD
TBD
Typ
-
-
-
L2
L2
) + C
.
ai17531
TBD
TBD
Max
stray
stray
-
-
-
= 2 pF,
where
87/167
µA/V
Unit
MΩ
pF
µA
s