參數(shù)資料
型號(hào): 935267418512
廠(chǎng)商: NXP SEMICONDUCTORS
元件分類(lèi): 微控制器/微處理器
英文描述: 1 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC44
封裝: PLASTIC, MO-047AC, SOT-187-2, LCC-44
文件頁(yè)數(shù): 19/42頁(yè)
文件大小: 249K
代理商: 935267418512
Philips Semiconductors
Product specification
SC28L91
3.3V–5.0V Universal Asynchronous
Receiver/Transmitter (UART)
2000 Sep 22
26
CSR CLOCK SELECT REGISTER
Addr
CSR (7:4)
CSR (3:0)
CSR
RECEIVER CLOCK SELECT
TRANSMITTER CLOCK SELECT
0x01
See Text and table 5
See Text and table 5
Table 5. Baud rate (base on a 3.6864MHz crystal clock)
MR0[0] = 0 (Normal Mode)
MR0[0] = 1 (Extended Mode I)
MR0[2] = 1 (Extended Mode II)
CSRA[7:4]
ACR[7] = 0
ACR[7] = 1
ACR[7] = 0
ACR[7] = 1
ACR[7] = 0
ACR[7] = 1
0000
50
75
300
450
4,800
7,200
0001
110
880
0010
134.5
1,076
0011
200
150
1200
900
19.2K
14.4K
0100
300
1800
28.8K
0101
600
3600
57.6K
0110
1,200
7200
7,200
115.2K
0111
1,050
2,000
1,050
2,000
1,050
2,000
1000
2,400
14.4K
57.6K
1001
4,800
28.8K
4,800
1010
7,200
1,800
7,200
1,800
57.6K
14.4K
1011
9,600
57.6K
9,600
1100
38.4K
19.2K
230.4K
115.2K
38.4K
19.2K
1101
Timer
1110
IP4–16X
1111
IP4–1X
NOTE:
1. The receiver clock is always a 16X clock except for CSR[7:4] = 1111. CSR[3:0]— Transmitter Clock Select. This field selects the baud rate
clock for the transmitter.
The field definition is as shown in Table 5, except as follows:
CSR[3:0]
1110
IP3 –16X
1111
IP3 –1X
The transmitter clock is always a 16X clock except for CSR[3:0] = 1111.
Table 6. Bit rate generator characteristics for Crystal or Clock = 3.6864MHz
NORMAL RATE (BAUD)
ACTUAL 16X CLOCK (KHz)
ERROR (%)
50
0.8
0
75
1.2
0
110
1.759
–0.069
134.5
2.153
0.059
150
2.4
0
200
3.2
0
300
4.8
0
600
9.6
0
1050
16.756
–0.260
1200
19.2
0
1800
28.8
0
2000
32.056
0.175
2400
38.4
0
4800
76.8
0
7200
115.2
0
9600
153.6
0
19.2K
307.2
0
38.4K
614.4
0
NOTE:
Duty cycle of 16X clock is 50%
1%
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