STR912FAW47X6 STMicroelectronics, STR912FAW47X6 Datasheet - Page 68

• Manufacturer Part Number: STR912FAW47X6
• Description: MCU ARM9 2048KB FLASH 128LQFP
• Manufacturer: STMicroelectronics
• Series: STR9r

Specifications of STR912FAW47X6

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 96MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, IrDA, Microwire, SPI, SSI, SSP, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 80
• Program Memory Size: 2MB (2M x 8)
• Program Memory Type: FLASH
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 2 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-LQFP
• Processor Series: STR912x
• Core: ARM966E-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 96 KB
• Interface Type: CAN, I2C, IrDA, SSP, UART, USB
• Maximum Clock Frequency: 96 MHz
• Number Of Programmable I/os: 80
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWARM, EWARM-BL, MCBSTR9, MCBSTR9U, MCBSTR9UME, KSDK-STR912-PLUS, MDK-ARM, RL-ARM, ULINK2
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Cpu Family: STR9
• Device Core: ARM966E-S
• Device Core Size: 16/32Bit
• Frequency (max): 96MHz
• Total Internal Ram Size: 96KB
• # I/os (max): 80
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Supply Voltage (max): 2/3.6V
• Operating Supply Voltage (min): 1.65/1.77/2.5/2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Package Type: LQFP
• For Use With: MCBSTR9UME - BOARD EVAL MCBSTR9 + ULINK-MEMCBSTR9U - BOARD EVAL MCBSTR9 + ULINK2MCBSTR9 - BOARD EVAL STM STR9 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-9039; STR912FAW47X6

Electrical characteristics
7.7.3
Note:
Caution:
68/102
Figure 16. Typical application with an external clock source
RTC clock generated from a crystal/ceramic resonator
The RTC (Real-Time Clock) can be supplied with a 32.768 kHz crystal/ceramic resonator
oscillator. All the information given in this paragraph is based on characterization results
obtained with typical external components specified in
application, the resonator and the load capacitors have to be placed as close as possible to
the oscillator pins in order to minimize output distortion and startup stabilization time. Refer
to the crystal resonator manufacturer for more details on the resonator characteristics
(frequency, package, accuracy).
For CL1 and CL2 it is recommended to use high-quality ceramic capacitors in the 5 pF to 16
pF range, selected to match the requirements of the crystal or resonator. CL1 and CL2, are
usually the same size. The crystal manufacturer typically specifies a load capacitance which
is the series combination of CL1 and CL2.
Load capacitance CL has the following formula:
where Cstray is the pin capacitance and board or trace PCB-related capacitance. Typically,
it is between 2 pF and 7 pF.
Never use a resonator with a load capacitance of 12.5 pF.
Example: if you choose a resonator with a load capacitance of CL = 6 pF, and Cstray = 2 pF,
then CL1 = CL2 = 8 pF.
Conditions: V
Table 20.
1. Refer to
2. Data based on bench measurements, not tested in production.
V
t
START(RTC)
STUP(RTC)
Symbol
R
g
M
F
Table 14
V
V
X1H
X1L
RTC oscillator electrical characteristics
DDQ
EXTERNAL
CLOCK SOURCE
External feedback resistor
Oscillator start voltage
Oscillator transconductance
Oscillator Start-up Time
for min. value of V
= 2.7 - 3.6 V, V
t
r(T1)
Parameter
CL = CL1 x CL2 / (CL1 + CL2) + Cstray
T
X1
hi-Z
Doc ID 13495 Rev 6
DD_LVD+
DD
t
f(X1)
= 1.65 - 2 V, T
(2)
X2_CPU
X1_CPU
90%
10%
(2)
Start-up
V
conditions
DD
Test
stable
t
w(X1H)
A
= -40 / 85 °C unless otherwise specified.
Table 20
I
V
L
DD_LVD+
t
w(X1L)
Min
1.8
f
OSC
STR91xF
&
(1)
Table
Value
Typ
22
21. In the
STR91xFAxxx
Max
1
µA/Volts
Unit
MΩ
V
S