SC28L92 View Datasheet(PDF) - Philips Electronics

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SC28L92

3.3V–5.0V Dual Universal Asynchronous Receiver/Transmitter (DUART)

Philips Electronics 

Philips Semiconductors

3.3V–5.0V Dual Universal Asynchronous

Receiver/Transmitter (DUART)

Product specification

SC28L92

CSR CLOCK SELECT REGISTER

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Addr

CSR (7:4)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSRA/B

RECEIVER CLOCK SELECT

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0x01

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0x09

See Text and table 5

CSR (3:0)

TRANSMITTER CLOCK SELECT

See Text and table 5

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 5. Baud rate (base on a 3.6864MHz crystal clock)

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSRA[7:4]

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0000

0001

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0010

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0011

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0100

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0101

0110

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 0111

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1000

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1001

1010

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1011

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1100

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1101

1110

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1111

MR0[0] = 0 (Normal Mode)

ACR[7] = 0

ACR[7] = 1

50

75

110

110

134.5

134.5

200

150

300

300

600

600

1,200

1,200

1,050

2,000

2,400

2,400

4,800

4,800

7,200

1,800

9,600

9,600

38.4K

19.2K

Timer

Timer

IP4–16X

IP4–16X

IP4–1X

IP4–1X

MR0[0] = 1 (Extended Mode I)

ACR[7] = 0

ACR[7] = 1

300

450

110

110

134.5

134.5

1200

900

1800

1800

3600

3600

7200

7,200

1,050

2,000

14.4K

14.4K

28.8K

28.8K

7,200

1,800

57.6K

57.6K

230.4K

115.2K

Timer

Timer

IP4–16X

IP4–16X

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—Channel B Clock Select Register

This field selects the baud rate clock for the Channel A transmitter.

The field definition is as shown in Table 5, except as follows:

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSRA[3:0]

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1110

1111

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ IP3–16X

IP3–1X

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ The transmitter clock is always a 16X clock except for

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CSR[3:0] = 1111.

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]

1110

1111

IP6–1X

IP6–16X

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]

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1110

1111

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ IP5–1X

IP5–16X

The transmitter clock is always a 16X clock except for

CSRB[3:0] = 1111.

2000 Jan 21

26

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