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C8051F91x/90x
5.10. IREF Connector (J7)
The C8051F912 Target Board also features a current-to-voltage 1 k ? load resistor that may be connected to the
current reference (IREF0) output that can be enabled on port pin (P0.7). Install a shorting block on J7 to connect
port pin P0.7 of the target device to the load resistor. If enabled by software, the IREF0 signal is then routed to the
J2[8] and H1[2] connectors.
5.11. VREF and AGND Connector (J13, J14)
The C8051F912 Target Board also features 4.7 μF capacitor in parallel with a 0.1 μF that can be connected to
P0.0/VREF when using the Precision Voltage Reference. The capacitors are connected to P0.0/VREF when a
shorting block is installed on J13. Using the Precision Voltage Reference is optional since 'F91x-'F90x devices
have an on-chip High-Speed Voltage Reference.
The shorting block J14 allows P0.1/AGND to be connected to ground. This provides a noise-free ground reference
to the analog-to-digital Converter. The use of this dedicated analog ground is optional.
5.12. C2 Pin Sharing
On the C8051F912, the debug pins C2CK and C2D are shared with the pins RST and P2.7, respectively. The
target board includes the resistors necessary to enable pin sharing which allow the RST and P2.7 pins to be used
normally while simultaneously debugging the device. See Application Note “AN124: Pin Sharing Techniques for the
C2 Interface” at www.silabs.com for more information regarding pin sharing.
18
Rev. 0.2
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相关PDF资料
C8051F930-TB
BOARD TARGET/PROTO W/C8051F930
C8051T610DB24
DAUGHTER BOARD T610 24QFN SOCKET
C8051T630DB20
BOARD SOCKET DAUGHTER 20-QFN
CAN-100
BOARD EVAL RS232 100QFP
CANADAPT28
KIT ADAPTER CANDEMOBOARD 28PLCC
CAT24AA01WI-GT3
IC EEPROM SERIAL 1KB I2C 8SOIC
CAT24AA02WI-G
IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C01ZI-G
IC EEPROM SERIAL 1KB I2C 8MSOP
相关代理商/技术参数
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