The CP2532/CP2528 is a 12/8‑key capacitive touch controller chip with SPI/I2C/GPIO interfaces, built‑in LDO, oscillator and low‑power modes.
The CP2532/CP2528 series from Qipan Microelectronics provides capacitive touch detection for up to 12 or 8 keys. It supports single‑point and sliding touch, offers SPI, I2C and GPIO interfaces, and includes programmable output modes, adjacent‑key suppression, backlight and buzzer functions.
Designed for battery‑powered devices, the chip operates from 2.6 V to 5.5 V, features a built‑in LDO with high PSRR, an internal oscillator, and three power modes (normal, power‑saving, sleep). It is suitable for media players, mobile phones, PC peripherals, home appliance controls, remote controls, and other portable multimedia products. This manual is written in Chinese.
| Maximum supported keys | 12/8 |
|---|---|
| Touch response time | 18~20 ms |
| Capacitive resolution | 0.02 pF (typical) |
| Measurement range | 0~80 pF |
| Supply voltage | 2.6 V – 5.5 V |
| Operating temperature range | -40 °C to 85 °C |
| Interfaces | SPI, I2C, GPIO |
| Output modes | Direct, encoded, serial |
| Power modes | Normal, power‑saving, sleep |
| Adjacent key suppression (ASS) | Enabled |
It supports SPI, I2C, and GPIO interfaces.
The touch response time is 18 to 20 ms.
It operates from 2.6 V to 5.5 V.
Typical resolution is 0.02 pF.