參數(shù)資料
型號： 935214890129
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP40
封裝： 0.600 INCH, PLASTIC, MO-015AJ, SOT-129-1, DIP-40
文件頁數(shù)： 10/36頁
文件大?。?/td> 314K
代理商： 935214890129
Philips Semiconductors
Product specification
SC26C92
Dual universal asynchronous receiver/transmitter (DUART)
2000 Jan 31
18
applied via CRB. After reading or writing MR0B, the pointer will
point to MR1B.
The bit definitions for this register are identical to MR0A, except that
all control actions apply to the Channel B receiver and transmitter
and the corresponding inputs and outputs. MR0B[3:0] are reserved.
MR1B – Channel B Mode Register 1
MR1B is accessed when the Channel B MR pointer points to MR1.
The pointer is set to MR1 by RESET or by a ‘set pointer’ command
applied via CRB. After reading or writing MR1B, the pointer will
point to MR2B.
The bit definitions for this register are identical to MR1A, except that
all control actions apply to the Channel B receiver and transmitter
and the corresponding inputs and outputs.
MR2B – Channel B Mode Register 2
MR2B is accessed when the Channel B MR pointer points to MR2,
which occurs after any access to MR1B. Accesses to MR2B do not
change the pointer.
The bit definitions for mode register are identical to the bit
definitions for MR2A, except that all control actions apply to the
Channel B receiver and transmitter and the corresponding inputs
and outputs.
CSRA – Channel A Clock Select Register
CSRA[7:4] – Channel A Receiver Clock Select
This field selects the baud rate clock for the Channel A receiver.
The field definition is shown in Table 5.
CSRB[7:4]
ACR[7] = 0
ACR[7] = 1
1110
1111
IP4-16X
IP4-1X
IP4-16X
IP4-1X
The receiver clock is always a 16X clock except for CSRB[7:4] = 1111.
CSRA[3:0] – Channel A Transmitter Clock Select
This field selects the baud rate clock for the Channel A transmitter.
The field definition is as shown in Table 5, except as follows:
CSRA[3:0]
ACR[7] = 0
ACR[7] = 1
1110
1111
IP3-16X
IP3-1X
IP3-16X
IP3-1X
The transmitter clock is always a 16X clock except for CSR[3:0] = 1111.
CSRB – Channel B Clock Select Register
CSRB[7:4] – Channel B Receiver Clock Select
This field selects the baud rate clock for the Channel B receiver.
The field definition is as shown in Table 5, except as follows:
CSRB[7:4]
ACR[7] = 0
ACR[7] = 1
1110
1111
IP6-16X
IP6-1X
IP6-16X
IP6-1X
The receiver clock is always a 16X clock except for CSRB[7:4] = 1111.
CSRB[3:0] – Channel B Transmitter Clock Select
This field selects the baud rate clock for the Channel B transmitter.
The field definition is as shown in Table 5, except as follows:
CSRB[3:0]
ACR[7] = 0
ACR[7] = 1
1110
1111
IP5-16X
IP5-1X
IP5-16X
IP5-1X
The transmitter clock is always a 16X clock except for
CSRB[3:0] = 1111.
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: The receiver clock is always a 16X clock except for CSRA[7:4] = 1111.
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