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UART S3C84E5/C84E9/P84E9
13-6
UART BAUD RATE DATA REGISTER (BRDATAH, BRDATAL)
The value stored in the UART baud rate register, (BRDATAH, BRDATAL), lets you determine the UART clock rate
(baud rate).
UART Baud Rate Data Register
(BRDATAH) EEH, Set1, Bank 0, R/W, Reset Value: FFH
(BRDATAL) EFH, Set1, Bank 0, R/W, Reset Value: FFH
.7MSB LSB.6 .5
.4
.3
.2 .1
.0
Brud rate data
Figure 13-4. UART Baud Rate Data Register (BRDATAH, BRDATAL)
BAUD RATE CALCULATIONS
The baud rate is determined by the baud rate data register, 16-bit BRDATA
Mode 0 baud rate = fxx/(16 × (16-bit BRDATA + 1))
Mode 1 baud rate = fxx/(16 × (16-bit BRDATA + 1))
Mode 2 baud rate = fxx/(16 × (16-bit BRDATA + 1))