SILICON LABS CP2402-GM

CP2400/1/2/3 devices are fixed function LCD drivers that can also be used for expanding GPIO, timekeeping, and increasing available system RAM by up to 256 bytes. The device is controlled using direct and indirect internal registers accessible through the 4-wire SPI or 2-wire SMBus interface. All digital pins on the device are 5 V tolerant.

• Controls up to 128 segments (48-pin packages) or 64 segments (32-pin package)
• Supports static, 2-mux, 3-mux, and 4-mux displays
• On-chip bias generation with internal charge pump
• Low power blink capability
• Expands GPIO count by up to 36 pins (48-pin packages) or 20 pins (32-pin package)
• GPIO pins may be configured to push-pull or open-drain outputs with two drive levels. GPIO may also be used as digital inputs (CP2400/1/2/3 pullups included)
• Port Match Capability can wake up host controller using interrupt pin
• 5 V Tolerant I/O
• Precision time keeping with 32.768 kHz watch crystal; self-oscillate mode requires no external crystal; accepts external 32 kHz CMOS clock
• 36-hour programmable counter with wake up alarm
• Can wake up the host controller using interrupt pin
• Low power (<1.5 μA)
• General purpose RAM expands the memory available to host controller.
• Two general purpose 16-bit timers
• 20 MHz Internal oscillator
• Can be clocked from an external CMOS clock
• 4-wire SPI Interface operates up to 2.5 Mbps with synchronous external clock or up to 1 Mbps with internal clock (CP2400/2 only).
• 2-wire SMBus/I²C Interface operates up to 400 kHz with internal clock (CP2401/3 only).
• Dedicated RST and INT pins.
• Optional CLK pin can be used as a CMOS clock input.
• Optional PWR pin (SMBus/I²C devices only) places the device in a low power mode. SPI devices use the NSS pin to place the device in a low power mode.
• 1.8–3.6 V operation with integrated LDO
• Ultra Low Power Mode w/ LCD (<3 μA typical)
• Shutdown current (0.05 μA typical)

• Handheld Equipment
• Utility Meters
• Thermostat Display
• Home Security Systems