Rainbow Electronics W90N745CDG - Manual (Page 259)

W90N745CD/W90N745CDG
- 254 -
6.10 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
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 5 clock
sources: 15M, 30M, 43.6M, 48M and 60M. 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)
UART Type : high speed UART
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. 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
: 15MHz
UART Type : general UART