DSPIC30F2010-30I Datasheet, PDF (105/203 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC30F2010
17.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART) MODULE
Note: This data sheet summarizes features of this group
of dsPIC30F devices and is not intended to be a complete
reference source. For more information on the CPU,
peripherals, register descriptions and general device
functionality, refer to the “dsPIC30F Family Reference
Manual” (DS70046).
This section describes the Universal Asynchronous
Receiver/Transmitter Communications module.
Note:
Since dsPIC30F2010 devices have only
one UART, all references to Ux... imply
that x = 1 only.
17.1 UART Module Overview
The key features of the UART module are:
• Full-duplex, 8 or 9-bit data communication
• Even, Odd or No Parity options (for 8-bit data)
• One or two Stop bits
• Fully integrated Baud Rate Generator with 16-bit
prescaler
• Baud rates range from 38 bps to 1.875 Mbps at a
30 MHz instruction rate
• 4-word deep transmit data buffer
• 4-word deep receive data buffer
• Parity, Framing and Buffer Overrun error detection
• Support for Interrupt only on Address Detect
(9th bit = 1)
• Separate Transmit and Receive Interrupts
• Loopback mode for diagnostic support
FIGURE 17-1:
UART TRANSMITTER BLOCK DIAGRAM
Internal Data Bus
Write
Write
Control and Status bits
UxTX
UTX8 UxTXREG Low Byte
Transmit Control
– Control TSR
– Control Buffer
– Generate Flags
– Generate Interrupt
Load TSR
UTXBRK
Data
‘0’ (Start)
‘1’ (Stop)
Transmit Shift Register (UxTSR)
Parity
Parity
Generator
16 Divider
Control
Signals
UxTXIF
16X Baud Clock
from Baud Rate
Generator
Note: x = 1 only.
© 2006 Microchip Technology Inc.
DS70118G-page 103