28L202A1B Просмотр технического описания (PDF) - Philips Electronics
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28L202A1B Datasheet PDF : 49 Pages
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Philips Semiconductors
Dual universal asynchronous receiver/transmitter
(DUART)
Objective specification
SC28L202
Table 9. Baud Rate (Base on a 14.7456MHz crystal clock)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ MR0[0] = 0 (NORMAL MODE)
MR0[0] = 1 (EXTENDED MODE I)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSRA[7:4]
ACR[7] = 0
ACR[7] = 1
ACR[7] = 0
ACR[7] = 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0000
50
75
300
450
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0001
110
110
110
110
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0010
134.5
134.5
134.5
134.5
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0011
200
150
1200
900
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0100
300
300
1800
1800
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0101
600
600
3600
3600
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0110
1,200
1,200
7200
7,200
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0111
1,050
2,000
1,050
2,000
1000
2,400
2,400
14.4K
14.4K
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1001
4,800
4,800
28.8K
28.8K
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1010
7,200
1,800
7,200
1,800
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1011
9,600
9,600
57.6K
57.6K
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1100
38.4K
19.2K
230.4K
115.2K
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1101
Timer
Timer
Timer
Timer
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1110
*** I/O? IP4–16X
IP4–16X
IP4–16X
IP4–16X
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1111
IP4–1X
IP4–1X
IP4–1X
IP4–1X
MR0[2] = 1 (EXTENDED MODE II)
ACR[7] = 0
ACR[7] = 1
4,800
7,200
880
880
1,076
1,076
19.2K
14.4K
28.8K
28.8K
57.6K
57.6K
115.2K
115.2K
1,050
2,000
57.6K
57.6K
4,800
4,800
57.6K
14.4K
9,600
9,600
38.4K
19.2K
Timer
Timer
IP4–16X
IP4–16X
IP4–1X
IP4–1X
NOTE:
The receiver clock is always a 16X clock except for CSRA [7:4] = 1111.
CSRA [3:0]—Channel A Transmitter Clock Select
CSRB [3:0]—Channel B Transmitter Clock Select
This field selects the baud rate clock for the Channel A transmitter.
This field selects the baud rate clock for the Channel B transmitter.
The field definition is as shown in Table 9, except as follows:
CSRA[3:0]
ACR[7] = 0
ACR[7] = 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1110
1111
IP3–16X
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ IP3–1X
IP3–16X
IP3–1X
The field definition is as shown in Table 9, 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
CSR [3:0] = 1111.
The transmitter clock is always a 16X clock except for
CSRB [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 9, except as follows:
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSRB [7:4]
ACR[7] = 0
ACR[7] = 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1110
1111
IP6–16X
IP6–1X
IP6–16X
IP6–1X
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ The receiver clock is always a 16X clock except for
CSRB [7:4] = 1111.
1998 Oct 05
31
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