CY8C9540A
CY8C9540A is 20 - 40 and 60 Bit I/O Expander manufactured by Cypress.
- Part of the CY8C9520A comparator family.
- Part of the CY8C9520A comparator family.
CY8C9520A CY8C9540A CY8C9560A
20-, 40-, and 60-Bit I/O Expander with EEPROM
Features
- I2C interface logic electrically patible 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 k Hz 24 MHz
1.5 MHz 93.75 k Hz 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...
