W90P710_05 Datasheet, PDF (320/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
7.12 Universal Asynchronous Receiver/Transmitter Controller
Asynchronous serial communication block include 4 UART blocks and accessory logic. They can be
described as follow:
• UART0
It is merely a general purpose UART. It does not include any accessory function.
Clock Source
: 15MHz
UART Type
: general UART, it is same as the UART of W90N740
FIFO Number
: 16-byte receiving FIFO and 16 byte transmitting FIFO
Modem Function
: N/A
Accessory Function
: N/A
• UART1
It is designed for general purpose UART or Bluetooth transceiver. It includes a high speed
UART block with 64-byte receiving FIFO and 64-byte transmitting FIFO. It includes 3 clock
sources: 15M, 30M, and 43.6M. Programmer can feel free to choose the clock source and
divisor number for suitable baud rate.
Clock Source
: 15MHz from external crystal
30M, 43.6M, 48M, 60M (optional function for Bluetooth HCI
transport layer)
UAR Type
: high speed UART, it is same as the UART of W99702
FIFO Number
: 64-byte receiving FIFO and 64 byte transmitting FIFO
Modem Function
: CTS and RTS (optional for Bluetooth. If they were enabled, TX & RX
in UART2 will be cut off)
Accessory Function
: Bluetooth (optional)
Baud Rate (max) : 1.875MHz
I/O pin
: TXD1, RXD1, RTS, CTS (optional)
• UART2
It is designed for general purpose UART or IrDA SIR. The part of UART includes 16-byte
receiving FIFO and 16-byte transmitting FIFO. The UART is same as the UART of
W90N740 but without modem function. The U3 block has merely 2 I/O. TXD2/RXD2 of
UART2 occupy the same pins with RTS and CTS of UART1. Once the Bluetooth function
has been enabled, UART2 should be disabled.
Clock Source
UART Type
FIFO Number
Modem Function
: 15MHz
: general UART, it is same as the UART of W90N740
: 16-byte receiving FIFO and 16 byte transmitting FIFO
: N/A
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