Z8F1680SH020SG Datasheet, PDF (198/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
173
Bit Position
[2]
BRGCTL
[1]
RDAIRQ
[0]
IREN
Value Description (Continued)
Baud Rate Generator Control
This bit causes different LIN-UART behavior depending on whether the LIN-UART
receiver is enabled (REN = 1 in the LIN-UART Control 0 Register). When the LIN-
UART receiver is not enabled, this bit determines whether the Baud Rate Generator
issues interrupts. When the LIN-UART receiver is enabled, this bit allows Reads from
the baud rate registers to return the BRG count value instead of the reload value.
Baud Rate Generator Control when the LIN-UART receiver is not enabled:
0
BRG is disabled. Reads from the Baud Rate High and Low Byte registers
return the BRG reload value.
1
BRG is enabled and counting. The Baud Rate Generator generates a receive
interrupt when it counts down to 0. Reads from the Baud Rate High and Low
Byte registers return the current BRG count value.
Baud Rate Generator Control when the LIN-UART receiver is enabled:
0
Reads from the Baud Rate High and Low Byte registers return the BRG reload
value.
1
Reads from the Baud Rate High and Low Byte registers return the current
BRG count value. Unlike the timers, there is no mechanism to latch the High
Byte when the Low Byte is read.
Receive Data Interrupt
0
Received data and receiver errors generates an interrupt request to the
Interrupt controller.
1
Received data does not generate an interrupt request to the Interrupt
controller. Only receiver errors generate an interrupt request.
Loop Back Enable
0
Infrared Encoder/Decoder is disabled. LIN-UART operates normally.
1
Infrared Encoder/Decoder is enabled. The LIN-UART transmits and receives
data through the Infrared Encoder/Decoder.
PS025015-1212
PRELIMINARY
LIN-UART