EM78811 Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

componentes Descripción

Fabricante

EM78811

8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT

ELAN Microelectronics 

EM78811

8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT

Special Purpose Registers

A (Accumulator)

• Internal data transfer, or instruction operand holding

• It’s not an addressable register.

CONT (Control Register)

7

6

5

4

3

2

1

0

-

-

TS

PAB

PSR2

PSR1

PSR0

Bit 0 (PSR0) ~ Bit 2 (PSR2) TCC/WDT prescaler bits.

PSR2

PSR1

PSR0 TCC Rate WDT Rate

0

0

0

1:2

1:1

0

0

1

1:4

1:2

0

1

0

1:8

1:4

0

1

1

1:16

1:8

1

0

0

1:32

1:16

1

0

1

1:64

1:32

1

1

0

1:128

1:64

1

1

1

1:256

1:128

Bit 3 ( PAB ) Prescaler assignment bit

0/1 : TCC/WDT

Bit 4 : unsed

Bit 5 ( TS ) : TCC signal source

0 : internal instruction cycle clock

1 : 16.38KHz

Bit 6: unused

Bit 7: unused

• CONT register is readable and writable

IOC6 ~ IOC9 (I/O Port Control Register)

• Five I/O direction control registers.

• "1" put the relative I/O pin into high impedance, while "0" put the relative I/O pin as output.

• User can see IOCB register how to switch to normal I/O port.

* This specification are subject to be changed without notice.

10.12.1998 11

Share Link: