C8051F509-IMR Silicon Labs, C8051F509-IMR Datasheet - Page 44

• Manufacturer Part Number: C8051F509-IMR
• Description: 8-bit Microcontrollers - MCU 50 MIPS 64 kB 4 kB SPI UART I2C
• Manufacturer: Silicon Labs

Specifications of C8051F509-IMR

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Processor Series: C8051

C8051F50x/F51x
Note: With system clock frequencies greater than 25 MHz, the VDD monitor level should be set to the high threshold
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with an external regulator powering VDD directly. See Figure 10.2 on page 85 for the recommended power
supply connections.
(VDMLVL = 1b in SFR VDM0CN) to prevent undefined CPU operation. The high threshold should only be used
Figure 5.1. Minimum VDD Monitor Threshold vs. System Clock Frequency
Rev. 1.2