Philips Semiconductors

Product specification

SC28L92

3.3V–5.0V Dual Universal Asynchronous

Receiver/Transmitter (DUART)

2000 Jan 21

31

SOPR—Set the Output Port Bits (OPR)

SOPR[7:0]—Ones in the byte written to this register will cause the corresponding bit positions in the OPR to set to 1. Zeros have no effect. This

allows software to set individual bits with our keeping a copy of the OPR bit configuration.

Addr

Bit 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

SOPR

OP 7

OP 6

OP 5

OP 4

OP 3

OP 2

OP 1

OP 0

0x0E

1=set bit

1=set bit

1=set bit

1=set bit

1=set bit

1=set bit

1=set bit

1=set bit

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

ROPR—Reset Output Port Bits (OPR)

ROPR[7:0]—Ones in the byte written to the ROPR will cause the corresponding bit positions in the OPR to set to 0. Zeros have no effect. This

allows software to reset individual bits with our keeping a copy of the OPR bit configuration.

Addr

Bit 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

ROPR

OP 7

OP 6

OP 5

OP 4

OP 3

OP 2

OP 1

OP 0

0x0F

1=reset bit

1=reset bit

1=reset bit

1=reset bit

1=reset bit

1=reset bit

1=reset bit

1=reset bit

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

0 = no

change

OPR Output Port Register

The output pins (OP pins) drive the compliment of the data in this register as controlled by SOPR and ROPR.

Addr

Bit 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

N/A

OP 7

OP 6

OP 5

OP 4

OP 3

OP 2

OP 1

OP 0

N/A

0 = Pin High

0 = Pin High

0 = Pin High

0 = Pin High

0 = Pin High

0 = Pin High

0 = Pin High

0 = Pin High

1 = Pin Low

1 = Pin Low

1 = Pin Low

1 = Pin Low

1 = Pin Low

1 = Pin Low

1 = Pin Low

1 = Pin Low