Baud Rate Generator Register 0 And 1 (Bgr0/1) - Fujitsu F2MCTM-16LX Hardware Manual

20.4.7

Baud Rate Generator Register 0 and 1 (BGR0/1)

The baud rate generator registers set the division ratio for the serial clock. Also, the
actual count of the transmission reload counter can be read.
Baud Rate Generator Register (BGRn0/n1)
Figure 20.4-8 shows the configuration of the baud rate generator register (BGRn0/n1).
Figure 20.4-8 Configuration of Baud Rate Generator Register (BGRn0/n1)
Address
bit15 bit14 bit13 bit12 bit11 bit10 bit9
BGR00: 000026
H
D14 D13D12 D11D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BGR01: 000027
H
R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
BGR10: 00002E
H
BGR11: 00002F
H
R/W : Read/Write
R : Read only
n = 0, 1
The baud rate generator registers determine the division ratio for the serial clock.
The BGRn1 corresponds to the upper bit and BGRn0 to lower bit, writing of the reload value to counter
and reading of the transmission reload counter value are allowed. Also, byte and word access are enabled.
When writing the reload value to the baud rate generator register, the reload counter starts counting.
bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit 7 to 0
BGRn0
write Write bit 7 to 0 of reload value to counter
read Read bit 7 to 0 of transmission reload counter
bit 14 to 8
BGRn1
write Write bit 14 to 8 of reload value to counter
read Read bit 14 to 8 of transmission reload counter
bit 15
read Returns "0"
CHAPTER 20 LIN-UART
Initial value
0 0 0 0 0 0 0 0
B
0 0 0 0 0 0 0 0
B
Baud rate Generator Register n0
Baud rate Generator Register n1
Unused bit
405