STM32F217ZGT6 STMicroelectronics, STM32F217ZGT6 Datasheet - Page 82

• Manufacturer Part Number: STM32F217ZGT6
• Description: MCU ARM 1024KB FLASH 144LQFP
• Manufacturer: STMicroelectronics
• Series: STM32r

Specifications of STM32F217ZGT6

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, Ethernet, I²C, IrDA, LIN, MMC, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 114
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 132K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 24x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Cpu Family: STM32
• Device Core: ARM Cortex-M3
• Device Core Size: 32b
• Frequency (max): 120MHz
• Total Internal Ram Size: 132KB
• # I/os (max): 114
• Number Of Timers - General Purpose: 14
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 1.8V
• On-chip Dac: 2(2-chx12-bit)
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11189

Electrical characteristics
5.3.11
Table 31.
1. Guaranteed by design, not tested in production.
82/158
MODEPER * INCSTEP
Symbol
f
md
Mod
PLL spread spectrum clock generation (SSCG) characteristics
The spread spectrum clock generation (SSCG) feature allows to reduce electromagnetic
interferences (see
SSCG parameters constraint
Equation 1
The frequency modulation period (MODEPER) is given by the equation below:
Equation 2
Equation 2 allows to calculate the increment step (INCSTEP):
An amplitude quantization error may be generated because the linear modulation profile is
obtained by taking the quantized values (rounded to the nearest integer) of MODPER and
INCSTEP. As a result, the achieved modulation depth is quantized. The percentage
quantized modulation depth is given by the following formula:
Figure 33
down spread modes, where:
F0 is f
T
md is the modulation depth.
mode
md
and
PLL_OUT
is the modulation period.
INCSTEP
quantized
Figure 34
Table 37: EMI
nominal.
%
=
=
round
show the main PLL output clock waveforms in center spread and
Peak modulation depth
Modulation frequency
(
MODEPER
MODEPER INCSTEP
[
Doc ID 17050 Rev 4
Parameter
(
(
2
characteristics). It is available only on the main PLL.
15
–
1
) md
×
=
×
round f
×
[
f
VCO_OUT
PLL_IN
×
100
⁄
(
)
4
×
⁄
(
×
5
100 5
)
f
Min
0.5
Mod
⁄
STM32F215xx, STM32F217xx
-
-
(
(
×
2
)
15
]
×
–
MODEPER
1
Typ
) f
-
-
-
×
VCO_OUT
Max
2
15
10
2
)
−1
]
(1)
)
Unit
KHz
dec
dec