ZHCSS40I march 1994 – march 2021 TL16C550C
PRODUCTION DATA
The ACE receiver section consists of a receiver shift register (RSR) and a RBR. The RBR is actually a 16-byte FIFO. Timing is supplied by the 16 x receiver clock (RCLK). Receiver section control is a function of the ACE line control register.
The ACE RSR receives serial data from SIN. The RSR then concatenates the data and moves it into the RBR FIFO. In the TL16C450 mode, when a character is placed in the RBR and the received data available interrupt is enabled (IER0 = 1), an interrupt is generated. This interrupt is cleared when the data is read out of the RBR. In the FIFO mode, the interrupts are generated based on the control setup in the FIFO control register.