PI7C9X1172

Description

The PI7C9X1172 is a I²C-bus/SPI to a dual-channel high performance UART bridge controller. It offers data rates up to 33 Mbps and guarantees low operating and sleeping current. The PI7C9X1172 also has up to 8 additional programmable general purpose I/O [GPIO] pins. The device comes in very small package, which makes it ideally suitable for cost efficient, handheld, battery operated applications. These UART bridges provide protocol conversion from I2C -bus or SPI to RS-232/RS-485/RS422 and are fully bidirectional.

The PI7C9X1172 supports SPI clock speeds up to 33Mbps and IrDA SIR up to 1.152Mbit/s.

The PI7C9X1172’s internal register set is backward-compatible with the widely used and widely popular 16C450 UART. The PI7C9X1172 also provides additional advanced features such as auto hardware and software flow control, automatic RS-485 support, support for fractional baud rates and software reset. This allows the software to reset the UART at any moment, independent of the hardware reset signal.

Feature(s)

• Dual channel full-duplex UART
• Support I²C-bus or SPI interface
• 64 bytes FIFO (transmitter and receiver)
• Fully compatible with industry standard 16C450, 16C550 and 16C2550
• Baud Rates up to 16Mbit/s in 4X sampling clock rate
• Programmable character formatting
  • 5-bit, 6-bit, 7-bit or 8-bit character
  • Even, odd, or no parity
  • 1, 1.5, or 2 stop bits
• Programmable Receive and Transmit FIFO trigger levels
• Special character detection
• Internal Loopback mode
• Line break generation and detection

Flow Control

• Support hardware flow control using RTS/CTS
• Support software flow control with programmable Xon/Xoff characters
• Programmable single or double Xon/Xoff characters

Interface Control

• Automatic RS-485 slave address detection
• RS-485 driver direction control via RTS signal
• RS-485 driver direction control inversion
• Built-in IrDA encoder and decoder interface
• Supports IrDA SIR with speeds up to 115.2kbit/s (optional 1.152Mbps)
• Up to eight user programmable GPIO pins
• Software reset

Others

• Low standby current at 3.3V
• Wide operation voltage (1.8V, 2.5V or 3.3V)
• Industrial temperature ranges -40˚C to 85˚C
• Crystal oscillator (up to 24MHz) or external clock (up to 64MHz) input
• I²C interface
• Compliant with I2C-bus fast speed
• Support slave mode only

SPI Interface

• PI7C9X1172 supports 33 Mbit/s maximum SPI clock speed
• Support SPI mode 0 (slave mode only)
• Packaging (Pb-free & Green):
  • 32-Pin, TQFN (ZH)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

• Industrial Computing
• Automation
• Factory Process Control
• Mobile Computing
• Embedded Applications
• Battery Operated Devices
• Networking