651
Chapter 32 USART (LIN / FIFO)
7.USART Operation
SPI). This will make sure, that the transmission data is valid and stable at any falling clock edge. (Necessary, if
the receiving device samples the data at falling clock edge). This function is disabled when CCO is enabled.
If the Serial Clock Edge Select (SCES) bit of the ESCR is set, the USARTs clock is inverted and thus samples
the reception data at the falling clock edge. In this case, the sending device must make sure that the serial
data is valid at the falling serial clock edge.
When both the SCES and the SCDE bit are set, data is stable at the rising clock edge, as in the case of SCES
= SCDE = 0. However, the marker value for idle state is inverted (low).
If the CCO bit of the Extended Status/Control Register (ESCR5) is set, the serial clock on the SCK5 pin in
master mode is continuously clocked out. It is strongly recommended to use start and stop bits in this mode to
signalize the receiver, when a data frame begins and when it stops. Figure
7-5
illustrates this.
Figure 7-5 Continuous clock output in mode 2
■
Data signal mode
NRZ data format is selected, if ECCR04: INV = 0, otherwise the signal mode for the serial data input and
output pin is RZ.
■
Error Detection
If no Start/Stop bits are selected (ECCR04: SSM = 0) only overrun errors are detected.
■
Communication
For initialization of the synchronous mode, the following settings have to be made:
• Baud Rate Generator Registers (BGR0/1):
Set the desired reload value for the dedicated Baud Rate Reload Counter
• Serial Mode Control Register (SMR04):
• MD1, MD0: "10b" (Mode 2)
• SCKE:“1” for dedicated Baud Rate Reload Counter
“0” for external clock input
• SOE:“1” for transmission and reception
“0” for reception only
• Serial Control Register (SCR04):
• RXE, TXE: one of these flag bit is set to "1"
• PEN: no parity provided - Value: don’t care
• P, SBL, A/D: no parity, no stop bit(s), no Address/Data selection - Value: don’t care
• CL: automatically fixed to 8-bit data - Value: don’t care
• CRE: "1" (the error flag is cleared for initialization, possible transmission
or reception will cut off)
• Serial Status Register (SSR04):
data frame
reception or transmission clock
data stream (SSM = 1)
(here: no parity, 1 stop bit)
ST
SP
(SCES = 0, CCO = 1):
reception or transmission clock
(SCES = 1, CCO = 1):
Содержание FR Family FR60 Lite
Страница 2: ...FUJITSU LIMITED ...
Страница 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
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Страница 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
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Страница 170: ...154 Chapter 9 Reset 10 Caution ...
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Страница 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Страница 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
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Страница 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Страница 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Страница 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Страница 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Страница 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Страница 412: ...396 Chapter 28 Bit Search 8 Caution ...
Страница 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 549: ...533 Chapter 31 External Bus 2 External Bus Interface Registers is set to the high impedance state ...
Страница 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Страница 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Страница 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Страница 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
Страница 762: ...746 Chapter 35 Free Run Timer 8 Caution ...
Страница 790: ...774 Chapter 37 Output Compare 8 Caution ...
Страница 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Страница 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Страница 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Страница 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Страница 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Страница 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Страница 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Страница 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Страница 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Страница 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Страница 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Страница 1032: ...1016 Chapter 55 Flash Security 4 Register ...
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