23-7
MSM66591/ML66592 User's Manual
Chapter 23 Serial Port with FIFO (SCI5)
23
23.6 Serial Data Input Register (SFDIN)
The serial data input register (SFDIN) is an 8-bit register used to read the data (stored
in the FIFO) received from the CAN controller. This register is read-only. Do not attempt
to write to this register.
Data is received from the SDIN pin into the shift register, and when 1 byte of data is
arranged in the shift register, it is automatically transferred to the FIFO. After the
number of bytes specified by S5RN0–S5RN3 of SCI5CON1 are received, a receive
complete interrupt is generated. By reading the FIFO via SFDIN during processing of
an interrupt, data can be read in order beginning with the first received data.
This register cannot be read during a serial transmission or reception.
At reset (when the
RES
signal is input, the BRK instruction is executed, the watchdog
timer is overflown, or an operation code trap is generated), SFDIN becomes undefined.
Figure 23-6 shows the configuration of SFDIN.
Figure 23-7 SFDOUT Configuration
Figure 23-6 SFDIN Configuration
23.7 Serial Data Output Register (SFDOUT)
The serial data output register (SFDOUT) is an 8-bit register used to write transmit data
(8 bytes max.) to the CAN controller. This register is write-only. Do not attempt to read
the contents that were written.
Data written to SFDOUT is first stored in the 8-byte FIFO. If transmission is enabled,
data stored in the FIFO is transferred in order to the shift register and then output from
the SDOUT pin.
This register cannot be written to during a serial transmission or reception.
At reset (when the
RES
signal is input, the BRK instruction is executed, the watchdog
timer is overflown, or an operation code trap is generated), SFDOUT becomes unde-
fined.
Figure 23-7 shows the configuration of SFDOUT.
SFDIN
7
6
5
4
3
2
1
0
Reads data received from the CAN
controller (reads data from FIFO)
SFDOUT
7
6
5
4
3
2
1
0
Writes transmit data to the CAN controller
(writes data to FIFO)
Содержание MSM66591
Страница 1: ...MSM66591 ML66592 User s Manual CMOS 16 bit microcontroller FEUL66591 66592 01 Issue Date Mar 4 2002...
Страница 15: ...Contents 12...
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Страница 18: ...Overview Chapter 1 1...
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Страница 30: ...Description of Pins Chapter 2 2...
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Страница 44: ...CPU Architecture Chapter 3 3...
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Страница 118: ...Port Functions Chapter 6 6...
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