PI7C9X1172 Datasheet, PDF (1/1 Pages) Pericom Semiconductor Corporation – UART Bridge Controller

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PI7C9X1172/762
I2C-bus/SPI to UART Bridge Controller w/ 64 bytes of TX/RX FIFOs
The PI7C9X1172/762 is a I2C-bus/SPI to a dual-channel
high performance UART bridge controller. It offers data rates
up to 20 Mbps and guarantees low operating and sleeping
current. The PI7C9X1172/762 also has up to 8 additional
programmable general purpose I/O [GPIO] pins. The device
comes in both very small TSSOP28 and TQFN32 packages,
which makes it ideally suitable for cost efficient, handheld,
battery operated applications. These UARTs provide a bridge
for protocol conversion from I2C -bus or SPI to and RS-232/
RS-485 and are fully bidirectional.
The PI7C9X1172/762 supports SPI clock speeds up to 20
Mbps and IrDA SIR up to 1.152 Mbit/s.
PI7C9X1172/762’s internal register set is backward-compatible
with the widely used and widely popular 16C450 UART.
The PI7C9X1172/762 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.
Application Diagram
Pericom
PI7C9X1172
Point of Sale _PI7C9X762
Pericom
PI7C9X1172
PI7C9X762
Mobile Computing
Features
ÎÎDual channel full-duplex UART
ÎÎSupport I2C-bus or SPI interface
ÎÎ64 bytes FIFO (transmitter and receiver)
ÎÎFully compatible with industrial standard 16C450 and
equivalent
ÎÎBaud Rates up to 16Mbit/s in 4X sampling clock rate
ÎÎProgrammable character formatting
ÎÎ5-bit, 6-bit, 7-bit or 8-bit character
ÎÎEven, odd, or no parity
ÎÎ1, 1.5, or 2 stop bits
ÎÎProgrammable Receive and Transmit FIFO trigger levels
ÎÎSpecial character detection
ÎÎInternal Loopback mode
ÎÎLine break generation and detection
ÎÎFlow control
ÎÎSupport hardware flow control using RTS/CTS
ÎÎSupport software flow control with programmable Xon/Xoff
characters
ÎÎProgrammable single or double Xon/Xoff characters
Interface control
ÎÎAutomatic RS-485 slave address detection
ÎÎRS-485 driver direction control via RTS signal
ÎÎRS-485 driver direction control inversion
ÎÎBuilt-in IrDA encoder and decoder interface
ÎÎSupports IrDA SIR with speeds up to 115.2 kbit/s ( optional
1.152Mbps)
ÎÎUp to eight user programmable GPIO pins
ÎÎSoftware reset
Others
ÎÎLow standby current at 3.3 V
ÎÎWide operation voltage (1.8V, 2.5V or 3.3V)
ÎÎCommercial temperature ranges
ÎÎAvailable in TSSOP28 and TQFN32 Packages
ÎÎI2C interface
ÎÎCompliant with I2C-bus fast speed
ÎÎSupport slave mode only
ÎÎCrystal oscillator (up to 24MHz) or external clock (up to
64MHz) input
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