RP1
About RP1
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Architecture
RP1 is a 12×12mm, 0.65mm-pitch BGA southbridge, which provides the majority of the I/O capabilities for Raspberry Pi 5.
It provides:
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4-lane PCIe 2.0 endpoint
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Gigabit Ethernet MAC
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2× USB 3 host controllers
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Each has 1× USB 3 and 1× USB 2 port
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More than twice the usable USB bandwidth vs. Raspberry Pi 4
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2× SDIO ports/eMMC (not used on Raspberry Pi 5)
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2× MIPI transceivers (4-lane, supporting DSI and CSI-2)
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Video DAC (3-channel, supporting PAL/NTSC and VGA)
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Only one channel (composite) used on Raspberry Pi 5
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Low-speed peripherals (SPI, UART, I2C, PWM, GPIO, I2S)
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Delta-sigma PWM audio out
More information on RP1 can be found in the RP1 Peripherals document.