CY8C9540A

CY8C9520A CY8C9540A CY8C9560A 20-, 40-, and 60-Bit I/O Expander with EEPROM Features ■ I2C interface logic electrically compatible with SMBus ■ Up to 20 (CY8C9520A), 40 (CY8C9540A), or 60 (CY8C9560A) I/O data pins independently configurable as inputs, outputs, Bi-directional input/outputs, or PWM outputs ■ 4/8/16 PWM sources with 8-bit resolution ■ Extendable soft addressing algorithm allowing flexible I2C address configuration ■ Internal 3-/11-/27-Kbyte EEPROM ■ User default storage, I/O port settings in internal EEPROM ■ Optional EEPROM write disable (WD) input ■ Interrupt output indicates input pin level changes and pulse width modulator (PWM) state changes ■ Internal power on reset (POR) ■ Internal configurable watchdog timer Top Level Block Diagram WD EEPROM User Settings Area User Available Area Clocks 32 kHz 24 MHz 1.5 MHz 93.75 kHz Divider (1-255) PWM 0 Control Unit GPort 0 GPort 1 GPort 2 8 Bit IO 5 Bit IO 3 Bit IO or A4-A6 4 Bit IO or A1-A3, WD6 GPort 3 8 Bit IO PWM 15 GPort 7 8 Bit IO SCL SDA V dd V ss Power-on-Reset INT A0 Overview The CY8C95xxA is a multi-port I/O expander with on board user available EEPROM and several PWM outputs. All devices in this family operate identically but differ in I/O pins, number of PWMs, and internal EEPROM size. The CY8C95xxA operates as two I2C slave devices. The first device is a multi port I/O expander (single I2C address to access all ports through registers). The second device is a serial EEPROM. Dedicated co...