20.4.1.3 UART Baud Rate Tables

UART baud rates are provided in Table 20-3, Table 20-4 and Table 20-5 for different UART Clock Frequencies (F_UART). The minimum and maximum baud rates for each frequency are also shown.

Table 20-3. UART Baud Rates (CLKMOD = `0` and BRGS = `0`)
BAUD RATE	F_UART = 100 MHz			F_UART = 80 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9600.6	0.01	650	9615.4	0.16	519
19,200	19230.8	0.16	324	19230.8	0.16	259
38,400	38580.2	0.47	161	38461.5	0.16	129
56,000	56306.3	0.55	110	56179.8	0.32	88
115,000	115740.7	0.64	53	116279.1	1.11	42
250,000	250000.0	0.00	24	250000.0	0.00	19
300,000	312500.0	4.17	19	312500.0	4.17	15
500,000	520833.3	4.17	11	500000.0	0.00	9
1,000,000	1041666.7	4.17	5	1000000.0	0.00	4
Min.	5.96	0.00	1048575	4.77	0.00	1048575
Max.	6250000.0	0.00	0	5000000.0	0.00	0


BAUD RATE	F_UART = 50 MHz			F_UART = 32 MHz			F_UART = 4 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9615.4	0.16	324	9615.4	0.16	207	9615.4	0.16	25
19,200	19290.1	0.47	161	19230.8	0.16	103	19230.8	0.16	12
38,400	38580.2	0.47	80	38461.5	0.16	51	41666.7	8.51	5
56,000	56818.2	1.46	54	57142.9	2.04	34	62500.0	11.61	3
115,000	115740.7	0.64	26	117647.1	2.30	16	125000.0	8.70	1
250,000	260416.7	4.17	11	250000.0	0.00	7	250000.0	0.00	0
300,000	312500.0	4.17	9	333333.3	11.11	5
500,000	520833.3	4.17	5	500000.0	0.00	3
1,000,000	1041666.7	4.17	2	1000000.0	0.00	1
Min.	2.98	0.00	1048575	1.91	0.00	1048575	0.24	0.00	1048575
Max.	3125000.0	0.00	0	2000000.0	0.00	0	250000.0	0.00	0

Table 20-4. UART Baud Rates (CLKMOD = `0` and BRGS = `1`)
BAUD RATE	F_UART = 100 MHz			F_UART = 80 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9600.6	0.01	2603	9601.5	0.02	2082
19,200	19201.2	0.01	1301	19212.3	0.06	1040
38,400	38402.5	0.01	650	38461.5	0.16	519
56,000	56053.8	0.10	445	56022.4	0.04	356
115,000	115207.4	0.18	216	115606.9	0.53	172
250,000	250000.0	0.00	99	250000.0	0.00	79
300,000	301204.8	0.40	82	303030.3	1.01	65
500,000	500000.0	0.00	49	500000.0	0.00	39
1,000,000	1000000.0	0.00	24	1000000.0	0.00	19
Min.	23.84	0.00	1048575	19.07	0.00	1048575
Max.	25000000.0	0.00	0	20000000.0	0.00	0


BAUD RATE	F_UART = 50 MHz			F_UART = 32 MHz			F_UART = 4 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9600.6	0.01	1301	9603.8	0.04	832	9615.4	0.16	103
19,200	19201.2	0.01	650	19230.8	0.16	415	19230.8	0.16	51
38,400	38461.5	0.16	324	38461.5	0.16	207	38461.5	0.16	25
56,000	56053.8	0.10	222	56338.0	0.60	141	58823.5	5.04	16
115,000	115740.7	0.64	107	115942.0	0.82	68	125000.0	8.70	7
250,000	250000.0	0.00	49	250000.0	0.00	31	250000.0	0.00	3
300,000	304878.0	1.63	40	307692.3	2.56	25	333333.3	11.11	2
500,000	500000.0	0.00	24	500000.0	0.00	15	500000.0	0.00	1
1,000,000	1041666.7	4.17	11	1000000.0	0.00	7	1000000.0	0.00	0
Min.	11.92	0.00	1048575	7.63	0.00	1048575	0.95	0.00	1048575
Max.	12500000.0	0.00	0	8000000.0	0.00	0	1000000.0	0.00	0

Table 20-5. UART Baud Rates (CLKMOD = `1`)
BAUD RATE	F_UART = 100 MHz			F_UART = 80 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9600.6	0.01	10416	9600.4	0.00	8333
19,200	19201.2	0.01	5208	19203.1	0.02	4166
38,400	38402.5	0.01	2604	38406.1	0.02	2083
56,000	56022.4	0.04	1785	56022.4	0.04	1428
115,000	115074.8	0.07	869	115107.9	0.09	695
250,000	250000.0	0.00	400	250000.0	0.00	320
300,000	300300.3	0.10	333	300751.9	0.25	266
500,000	500000.0	0.00	200	500000.0	0.00	160
1,000,000	1000000.0	0.00	100	1000000.0	0.00	80
Min.	95.37	0.00	1048575	76.29	0.00	1048575
Max.	6250000.0	0.00	0	5000000.0	0.00	16


BAUD RATE	F_UART = 50 MHz			F_UART = 32 MHz			F_UART = 4 MHz
BAUD RATE	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)	Actual Baud Rate	% Error	BRG Value (Decimal)
9,600	9600.6	0.01	5208	9601.0	0.01	3333	9615.4	0.16	416
19,200	19201.2	0.01	2604	19207.7	0.04	1666	19230.8	0.16	208
38,400	38402.5	0.01	1302	38415.4	0.04	833	38461.5	0.16	104
56,000	56053.8	0.10	892	56042.0	0.08	571	56338.0	0.60	71
115,000	115207.4	0.18	434	115107.9	0.09	278	117647.1	2.30	34
250,000	1250000.0	0.00	200	250000.0	0.00	128	250000.0	0.00	16
300,000	301204.8	0.40	166	301886.8	0.63	106
500,000	500000.0	0.00	100	500000.0	0.00	64
1,000,000	1000000.0	0.00	50	1000000.0	0.00	32
Min.	47.68	0.00	1048575	30.52	0.00	1048575	3.81	0.00	1048575
Max.	3125000.0	0.00	16	2000000.0	0.00	16	250000.0	0.00	16