General Purpose Manchester (Full-Featured UARTs Only)

General purpose Manchester is a subset of the DALI mode. When the UxP1L register is cleared, there is no minimum wait time between frames. This allows full and half-duplex operation because writes to the UxTXB register are not held waiting for a receive operation to complete.

General purpose Manchester operation maintains all other aspects of DALI mode as shown in Figure 3 such as:

• Single-pulse Start bit
• Most Significant bit first
• No stop periods between back-to-back bytes

The general purpose Manchester mode is configured with the following settings:

• MODE = ‘b1000
• TXEN = 1
• RXEN = 1
• UxP1 = 0h
• UxBRG = desired baud rate
• TXPOL and RXPOL = desired Idle state
• STP = desired number of stop periods
• RxyPPS = TX pin selection code
• TX pin TRIS control = 0
• RXPPS = RX pin selection code
• RX pin TRIS control = 1
• Input pin ANSEL bit = 0
• ON = 1

The Manchester bit stream timing is shown in Figure 3.