STM32100B-EVAL STMicroelectronics, STM32100B-EVAL Datasheet - Page 13

• Manufacturer Part Number: STM32100B-EVAL
• Description: MCU, MPU & DSP Development Tools STM32 ARM Value Line Eval Board
• Manufacturer: STMicroelectronics

Specifications of STM32100B-EVAL

• Processor To Be Evaluated: STM32F100VB
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB, I2C, SPI, USART
• Operating Supply Voltage: 3.3 V
• Silicon Manufacturer: ST Micro
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: STM32
• Silicon Family Name: STM32F1xx
• Kit Contents: Board
• Features: IrDA Transceiver,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UM0841
Figure 5.
Note:
2.15.4
2.16
ID D _C N T_EN
Q13 = L OW _POW ER _EN
(T2 p in 3)
Q14 = L P_W AK EU P
Q14n = U 7 p in 4
1
2
MCU mo d e
In low power mode, the 1 KΩ resistor is connected when T2 goes off after entering low
power mode. Q13 output of the counter allows connection of the 1KΩ resistor when the
current IDD becomes very low. The measurement timing is given in
STM32100B-EVAL IDD low power mode measurement timing diagram
The low power mode measurement procedure can be used in Standby or Stop mode if the
IDD current does not exceed 60 uA, otherwise the Run mode measurement procedure
should be used up to 60 mA.
The standby current measure is not possible on MB871 rev A as explained in chapter 3.5
IDD standby measure.
In standby mode the bias current of operational amplifier input (U6 pin 4) is not negligible
compared to IDD current (Typical I bias is ~200 nA). To improve the IDD measurement
precision it mandatory to subtract the I bias current to the IDD standby measure since this
current is not sink by the MCU. It is possible to measure I bias (U1 pin 4 current) and to
subtract this value to MCU current.
Low IDD measurement improvement procedure
The procedure for precision IDD measurement is:
1.
2.
3.
4.
5.
HDMI CEC
Two HDMI connectors CN15 and CN16 are available on the STM32100B-EVAL board. The
signals CEC, SCL, SDA and HPD are supported and connected to the STM32F100VBT6
through HDMI2C1-5DIJ, the ST full integrated ESD protection, level-shifting device and
signal booster for control links of the HDMI 1.3 transmitter.
Table 9.
SB4
Jumper
Place a jumper on JP8 pins 1 and 2.
Follow the low power mode procedure to measure I1 = I bias.
Remove jumper JP8 pins 1 and 2 and place it on JP8 pins 2 and 3.
Follow the low power mode procedure to measure I2 = IDD + I bias.
Calculate actual IDD: IDD = I2 - I1.
R u n
The +5 V power pin of HDMI connectors CN15 and CN16 is connected to 5 V power on the
STM32100B-EVAL board when SB4 is closed. Default status: Open
0
HDMI CEC solder bridge
Low pow er mode IDD measurement timing
Doc ID 16533 Rev 2
L ow p o wer
150mS
Description
Hardware layout and configuration
300mS
W ake-u p
Figure
ID D Measu re
5.
C lear C N T
450mS
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