ST16C580

17

Rev. 1.20

A2 A1 A0

Register

BIT-7

BIT-6

BIT-5

BIT-4

BIT-3

BIT-2

BIT-1

BIT-0

[Default]

Note *5

Enhanced Register Set: Note *4

0

1

0

EFR [00]

Auto

Auto

Special

Enable

Cont-3

Cont-2

Cont-1

Cont-0

CTS

RTS

Char.

IER

Tx,Rx

Tx,Rx

Tx,Rx

Tx,Rx

select

Bits 4-7,

Control

Control

Control

Control

ISR, FCR

Bits 4-5,

MCR

Bits 5-7

1

0

0

Xon-1 [00]

bit-7

bit-6

bit-5

bit-4

bit-3

bit-2

bit-1

bit-0

1

0

1

Xon-2 [00]

bit-15

bit-14

bit-13

bit-12

bit-11

bit-10

bit-9

bit-8

1

1

0

Xoff-1 [00]

bit-7

bit-6

bit-5

bit-4

bit-3

bit-2

bit-1

bit-0

1

1

1

Xoff-2 [00]

bit-15

bit-14

bit-13

bit-12

bit-11

bit-10

bit-9

bit-8

Note *3: The Special register set is accessible only when LCR bit-7 is set to a logic 1.

Note *4: Enhanced Feature Register, Xon 1,2 and Xoff 1,2 are accessible only when LCR is set to “BF“ Hex

Note *5: The value represents the register’s initialized HEX value. An “X” signifies a 4-bit un-initialize nibble.