Infineon PSoC 4 Quick Start Quide page 4

PSoC 4 Programming Using an External Microcontroller (HSSP)
Introduction
HSSP: HSSP refers to the programming of the target device on the board using a host microcontroller. The
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target is programmed through the SWD interface. In this application note, HSSP uses a bit-banging
implementation to program the target device. Bit-banging programming refers to the technique in which
programming pins are manipulated using a software code that resides in the host programmer.
Differences between bootloading and HSSP: In embedded systems, bootloaders are also used to update the
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system firmware. Bootloading and HSSP differ in the following key aspects:
Bootloaders are used to update the flash memory of the device over a standard communication protocol.
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Bootloaders can update only a specific portion of the flash memory, known as the bootloadable area.
On the other hand, HSSP supports complete programming of the flash memory in the target device.
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Bootloaders can use any standard communication interface (such as, USB, I
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the firmware, while HSSP uses an SWD or JTAG interface to program the flash. PSoC 4 supports only SWD
interfaces.
Application Note 4 of 45
C, SPI, and UART) to update
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001-84858 Rev. *N
2021-03-23