6 extended communication control register (eccr04) – FUJITSU MB91460 SERIES FR60 User Manual
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Chapter 32 USART (LIN / FIFO)
4.USART Registers
* see table
4.6 Extended Communication Control Register (ECCR04)
The extended communication control register provides bus idle recognition, interrupt settings, synchronous
clock settings, and the LIN break generation.
Table 4-6 Function of each bit of the Extended Status/Control Register (ESCR4)
Bit name
Function
bit15
LBIE: LIN break
detection interrupt
enable bit
This bit enables a reception interrupt, if a LIN break was detected.
bit14
LBD: LIN break
detected flag
This bit goes 1 if a LIN break was detected. Writing a 0 to it clears this
bit and the corresponding interrupt, if it is enabled.
Note: RMW instructions always return "1". In this case, the value "1"
does not indicate a LIN-Break.
bit13
bit12
LBL1/0: LIN break
length selection
These two bits determine how many serial bit times the LIN break is
generated by USART. Receiving a LIN break is always fixed to 13 bit
times.
bit11
SOPE: Serial Output
pin direct access
enable*
Setting this bit to 1 enables the direct write to the SOT04 pin, if SOE
= 1 (SMR04).*
bit10
SIOP: Serial Input/
Output Pin direct
access*
Normal read instructions always return the actual value of the SIN04
pin. Writing to it sets the bit value to the SOT04 pin, if SOPE = 1.
During a Read-Modify-Write instruction the bit returns the SOT04
value in the read cycle.*
bit9
CCO: Continuos
Clock Output enable
bit
This bit enables a continuos serial clock at the SCK04 pin if USART
operates in master mode 2 (synchronous) and the SCK04 pin is
configured as a clock output.
bit8
SCES: Serial clock
edge selection bit
This bit inverts the internal serial clock in mode 2 (synchronous) and
the output clock signal, if USART operates in master mode 2
(synchronous) and the SCK04 pin is configured as a clock output.
In slave mode 2 the sampling time turns from rising edge to falling
edge.
Table 4-7 * Description of the interaction of SOPE and SIOP:
SOPE
SIOP
Writing to SIOP
Reading from SIOP
0
R/W
has no effect on the SOT4 pin
but holds the written value.
returns current value of SIN04
1
R/W
write "0" or "1" to SOT04
returns current value of SIN04
1
RMW
returns current value of SOT04
and writes it back