C8051F411-GMR Silicon Laboratories Inc, C8051F411-GMR Datasheet - Page 267

• Manufacturer Part Number: C8051F411-GMR
• Description: Microcontrollers (MCU) 50 MIPS 32KB 12ADC RTCLOCK 28 PIN MCU
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F411-GMR

• Processor Series: C8051F4x
• Core: 8051
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2.25 KB
• Interface Type: I2C, SMBus, SPI, UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 20
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F410DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 20 Channel
• On-chip Dac: 12 bit, 2 Channel
• Package: 28QFN EP
• Device Core: 8051
• Family Name: C8051F41x
• Maximum Speed: 50 MHz
• Ram Size: 2.25 KB
• Operating Supply Voltage: 1.8|2.5|3.3|5 V
• Operating Temperature: -40 to 85 °C
• Lead Free Status / Rohs Status: Details

26.2. C2 Pin Sharing
The C2 protocol allows the C2 pins to be shared with user functions so that in-system debugging and
Flash programming functions may be performed. This is possible because C2 communication is typically
performed when the device is in the halt state, where all on-chip peripherals and user software are stalled.
In this halted state, the C2 interface can safely ‘borrow’ the C2CK (/RST) and C2D (P2.0) pins. In most
applications, external resistors are required to isolate C2 interface traffic from the user application. A typi-
cal isolation configuration is shown in Figure 26.1.
The configuration in Figure 26.1 assumes the following:
Additional resistors may be necessary depending on the specific application.
1. The user input (b) cannot change state while the target device is halted.
2. The /RST pin on the target device is used as an input only.
/Reset (a)
Output (c)
Input (b)
Figure 26.1. Typical C2 Pin Sharing
C2 Interface Master
Rev. 1.1
C2CK
C2D
C8051Fxxx
C8051F410/1/2/3
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