STR712FR0T6 STMicroelectronics, STR712FR0T6 Datasheet - Page 43

• Manufacturer Part Number: STR712FR0T6
• Description: MCU 32BIT 64KB FLASH 64-LQFP
• Manufacturer: STMicroelectronics
• Series: STR7r

Specifications of STR712FR0T6

• Core Processor: ARM7
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: CAN, HDLC, I²C, Smartcard, SPI, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8 + 16K)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Processor Series: STR712x
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: CAN
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWARM, EWARM-BL, MCBSTR7, KSK-STR712-PL, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: STR710-SK/HIT, STR71X-SK/RAIS, STX-PRO/RAIS, STX-RLINK, STR79-RVDK/CPP, STR79-RVDK, STR79-RVDK/UPG
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 4 Channel
• For Use With: MCBSTR7UME - MCBSTR7 + ULINK-ME DEV KITMCBSTR7 - BOARD EVAL STM STR71X SERIES497-4886 - KIT STARTER FOR STR712F ARM MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-4887

STR71xF
OSC32K crystal / ceramic resonator oscillator
The STR7 RTC clock can be supplied with a 32 kHz Crystal/Ceramic resonator oscillators.
All the information given in this paragraph are based on characterization results with
specified typical external components. In the 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 start-up stabilization time. Refer to the crystal resonator manufacturer
for more details (frequency, package, accuracy...).
Table 20.
Notes:
1. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
2.
Figure 15. Typical application with a 32 kHz crystal
t
SU(OSC32KHZ)
WHEN RESONATOR WITH
INTEGRATED CAPACITORS
small R
32 kHz oscillation is reached. This value is measured for a standard crystal resonator and it can vary
significantly with the crystal manufacturer
t
SU(OSC32KHZ)
Symbol
C
C
R
g
i
2
L1
L2
m
F
S
value for example MSIV-TIN32.768kHz. Refer to crystal manufacturer for more details
32K oscillator characteristics (f
2)
is the start-up time measured from the moment it is enabled (by software) to a stabilized
C
Feedback resistor
Recommended load capacitance
versus equivalent serial resistance
of the crystal (R
RTCXT2 driving current
Oscillator Transconductance
startup time
L2
C
L1
32 kHz
RESONATOR
Parameter
S
)
1)
RTCXT1
RTCXT2
R
OSC32K=
F
i
2
R
V
V
V
33
IN
S
33
=40K Ω
=V
=3.3 V
32.768 kHz)
is stabilized
Conditions
SS
FEEDBACK
LOOP
STR710
Electrical parameters
f
OSC32K
12.5
Typ
2.7
3.2
8
5
µA/V
Unit
MΩ
pF
µA
s
43/78