2004 Microchip Technology Inc.
Advance Information
DS70119B-page 107
dsPIC30F6010
18.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART) MODULE
This section describes the Universal Asynchronous
Receiver/Transmitter Communications module.
18.1
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 18-1:
UART TRANSMITTER BLOCK DIAGRAM
Write
Write
UTX8
UxTXREG Low Byte
Load TSR
Transmit Control
– Control TSR
– Control Buffer
– Generate Flags
– Generate Interrupt
Control and Status bits
UxTXIF
Data
‘
0
’ (Start)
‘
1
’ (Stop)
Parity
Parity
Generator
Transmit Shift Register (UxTSR)
16 Divider
Control
Signals
16X Baud Clock
from Baud Rate
Generator
Internal Data Bus
UTXBRK
Note:
x = 1 or 2.
UxTX
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