mg84fl54b Megawin Technology, mg84fl54b Datasheet - Page 33

• Manufacturer Part Number: mg84fl54b
• Description: Full-speed Usb Micro-controller
• Manufacturer: Megawin Technology

Baud Rate in Mode 2
Baud Rate in Mode 1 & 3
(1) Using Timer 1 as the Baud Rate Generator
Note1:
For Fosc=12MHz, if {BRADJ1,BRADJ0}=01, T1X12=1, SMOD=1 and TH1=243, then we can get:
Baud Rate = (2/16) x 12MHz / (256-243) = 115385 bps.
Where, the deviation to the standard 115200 bps is +0.16%, which is acceptable in an UART communication.
MEGAWIN
T1X12 = 0
T1X12 = 1
(The same as standard 8051)
B.R. =
B.R. =
BRADJ = 0
2
B.R. =
SMOD
64
(The same as standard 8051)
2
SMOD
32
2
x
SMOD
Fosc
32
BRADJ = 0
x
x
12 x (256-TH1)
MG84FL54B Data sheet
256-TH1
Fosc
Fosc
B.R. =
B.R. =
B.R. =
2
SMOD
BRADJ = 1
16
2
2
SMOD
SMOD
32
16
BRADJ = 1
Note1
x
x
x
12 x (256-TH1)
Fosc
256-TH1
Fosc
Fosc
33