s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 369

• Manufacturer Part Number: s3c4510b
• Description: 16/32-bit Risc Microcontroller
• Manufacturer: Samsung Semiconductor, Inc.

S3C4510B
UART BAUD RATE EXAMPLES
UART BRG input clock, MCLK2 is the system clock frequency divided by 2.
If the system clock frequency is 50 MHz and MCLK2 is selected, the maximum BRGOUT output clock rate is
MCLK2/16 (= 1.5625 MHz).
UCLK is the external clock input pin for UART0, UART1. UART BRG input clock, MCLK2, UCLK can be selected
by UCCON[6] register.
Baud Rates
(BRGOUT)
115200
230400
460860
19200
38400
57600
1200
2400
4800
9600
MCLK2
UCLK
NOTE:
SC
CNT0 = UBTDIVn [15:4], CNT1 = UBRDIVn [3:0], SC = ULCON [6]
CNT0
1301
650
324
162
80
40
26
13
6
2
12-bit Counter
Table 10-14. Typical Baud Rates Examples of UART
Figure 10-9. UART Baud Rate Generator (BRG)
CNT0
MCLK2 = 25 MHz
CNT1
0
0
0
0
0
0
0
0
0
0
223214.28
520833.34
111607.1
19290.1
38109.8
57870.4
1200.1
2400.2
4807.7
9585.9
Freq.
Divide by 1 or 16
Dev.(%)
CNT1
13.01
- 0.1
- 0.8
- 3.1
3.12
0.0
0.0
0.2
0.5
0.5
CNT0
1735
867
433
216
108
53
35
17
8
4
Divide by 16
CNT1
UCLK = 33 MHz
1
1
0
0
0
0
0
0
0
0
115740.74
231481.48
416666.66
19113.15
38580.15
57870.37
1200.08
2400.15
4800.31
9600.61
BRGOUT
Sample Clock
Freq.
Dev.(%)
0.0064
0.0064
0.0064
0.0064
0.45
0.47
0.47
0.47
0.47
9.59
UART
10-15