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ZHCU032K December 2004 – August 2022 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2132-EP , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2252-Q1 , MSP430F2254 , MSP430F2272 , MSP430F2272-Q1 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2201-Q1 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2231-Q1 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430TCH5E

15.3.13 典型的波特率和错误

对于一个使用 32768HZ 的晶振源 ACLK 和典型的 SMCLK 频率，在表 15-4和表 15-5中列出了 UCBRSx 和 UCBRFx 的标准波特率数据。要确保所选 BRCLK 频率不超过特定器件的最大 USCI 输入频率（请参阅《特定器件的数据手册》）。

相对于在每位中间的理想扫描时间，接收错误是累积时间错误。为一个带奇偶校验的 8 位字符的接收和一个包括同步误差的停止位给出定了最糟糕的错误。

相对于理想位周期时间，发送错误是时间累积错误为一个带奇偶校验的 8 位字符的发送和一个停止位给出定了最严重的错误。

表 15-4 常用波特率，设置，和错误，UCOS16= 0

BRCLK 频率[Hz]	波特率[波特]	UCBRx	UCBRSx	UCBRFx	最大 TX 错误[％]		最大 RX 错误[％]
32,768	1200	27	2	0	-2.8	1.4	-5.9	2.0
32,768	2400	13	6	0	-4.8	6.0	-9.7	8.3
32,768	4800	6	7	0	-12.1	5.7	-13.4	19.0
32,768	9600	3	3	0	-21.1	15.2	-44.3	21.3
1,048,576	9600	109	2	0	-0.2	0.7	-1.0	0.8
1,048,576	19200	54	5	0	-1.1	1.0	-1.5	2.5
1,048,576	38400	27	2	0	-2.8	1.4	-5.9	2.0
1,048,576	56000	18	6	0	-3.9	1.1	-4.6	5.7
1,048,576	115200	9	1	0Ω	-1.1	10.7	-11.5	11.3
1,048,576	128000	8	1	0Ω	-8.9	7.5	-13.8	14.8
1,048,576	256000	4	1	0Ω	-2.3	25.4	-13.4	38.8
1,000,000	9600	104	1	0Ω	-0.5	0.6	-0.9	1.2
1,000,000	19200	52	0	0	-1.8	0	-2.6	0.9
1,000,000	38400	26	0	0	-1.8	0	-3.6	1.8
1,000,000	56000	17	7	0	-4.8	0.8	-8.0	3.2
1,000,000	115200	8	6	0	-7.8	6.4	-9.7	16.1
1,000,000	128000	7	7	0	-10.4	6.4	-18.0	11.6
1,000,000	256000	3	7	0	-29.6	0	-43.6	5.2
4,000,000	9600	416	6	0	-0.2	0.2	-0.2	0.4
4,000,000	19200	208	3	0	-0.2	0.5	-0.3	0.8
4,000,000	38400	104	1	0Ω	-0.5	0.6	-0.9	1.2
4,000,000	56000	71	4	0	-0.6	1.0	-1.7	1.3
4,000,000	115200	34	6	0	-2.1	0.6	-2.5	3.1
4,000,000	128000	31	2	0	-0.8	1.6	-3.6	2.0
4,000,000	256000	15	5	0	-4.0	3.2	-8.4	5.2
8,000,000	9600	833	2	0	-0.1	0	-0.2	0.1
8,000,000	19200	416	6	0	-0.2	0.2	-0.2	0.4
8,000,000	38400	208	3	0	-0.2	0.5	-0.3	0.8
8,000,000	56000	142	7	0	-0.6	0.1	-0.7	0.8
8,000,000	115200	69	4	0	-0.6	0.8	-1.8	1.1
8,000,000	128000	62	4	0	-0.8	0	-1.2	1.2
8,000,000	256000	31	2	0	-0.8	1.6	-3.6	2.0
12,000,000	9600	1250	0	0	0	0	-0.05	0.05
12,000,000	19200	625	0	0	0	0	-0.2	0
12,000,000	38400	312	4	0	-0.2	0	-0.2	0.2
12,000,000	56000	214	2	0	-0.3	0.2	-0.4	0.5
12,000,000	115200	104	1	0Ω	-0.5	0.6	-0.9	1.2
12,000,000	128000	93	6	0	-0.8	0	-1.5	0.4
12,000,000	256000	46	7	0	-1.9	0	-2.0	2.0
16,000,000	9600	1666	6	0	-0.05	0.05	-0.05	0.1
16,000,000	19200	833	2	0	-0.1	0.05	-0.2	0.1
16,000,000	38400	416	6	0	-0.2	0.2	-0.2	0.4
16,000,000	56000	285	6	0	-0.3	0.1	-0.5	0.2
16,000,000	115200	138	7	0	-0.7	0	-0.8	0.6
16,000,000	128000	125	0	0	0	0	-0.8	0
16,000,000	256000	62	4	0	-0.8	0	-1.2	1.2

表 15-5 常用波特率，设置，和错误，UCOS16=1

BRCLK 频率[Hz]	波特率[波特]	UCBRx	UCBRSx	UCBRFx	最大 TX 错误[％]		最大 RX 错误[％]
1,048,576	9600	6	0	13	-2.3	0	-2.2	0.8
1,048,576	19200	3	1	6	-4.6	3.2	-5.0	4.7
1,000,000	9600	6	0	8	-1.8	0	-2.2	0.4
1,000,000	19200	3	0	4	-1.8	0	-2.6	0.9
1,000,000	57600	1	7	0	-34.4	0	-33.4	0
4,000,000	9600	26	0	1	0Ω	0.9	0	1.1
4,000,000	19200	13	0	0	-1.8	0	-1.9	0.2
4,000,000	38400	6	0	8	-1.8	0	-2.2	0.4
4,000,000	57600	4	5	3	-3.5	3.2	-1.8	6.4
4,000,000	115200	2	3	2	-2.1	4.8	-2.5	7.3
4,000,000	230400	1	7	0	-34.4	0	-33.4	0
8,000,000	9600	52	0	1	-0.4	0	-0.4	0.1
8,000,000	19200	26	0	1	0Ω	0.9	0	1.1
8,000,000	38400	13	0	0	-1.8	0	-1.9	0.2
8,000,000	57600	8	0	11	0	0.88	0	1.6
8,000,000	115200	4	5	3	-3.5	3.2	-1.8	6.4
8,000,000	230400	2	3	2	-2.1	4.8	-2.5	7.3
8,000,000	460800	1	7	0	-34.4	0	-33.4	0
12,000,000	9600	78	0	2	0	0	-0.05	0.05
12,000,000	19200	39	0	1	0	0	0	0.2
12,000,000	38400	19	0	8	-1.8	0	-1.8	0.1
12,000,000	57600	13	0	0	-1.8	0	-1.9	0.2
12,000,000	115200	6	0	8	-1.8	0	-2.2	0.4
12,000,000	230400	3	0	4	-1.8	0	-2.6	0.9
16,000,000	9600	104	0	3	0	0.2	0	0.3
16,000,000	19200	52	0	1	-0.4	0	-0.4	0.1
16,000,000	38400	26	0	1	0Ω	0.9	0	1.1
16,000,000	57600	17	0	6	0	0.9	-0.1	1.0
16,000,000	115200	8	0	11	0	0.9	0	1.6
16,000,000	230400	4	5	3	-3.5	3.2	-1.8	6.4
16,000,000	460800	2	3	2	-2.1	4.8	-2.5	7.3