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EM78860BQ

8 -BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78P860

8 -BIT MICRO-CONTROLLER

• Bit 6 :unused. Please set to ‘0’.

• Bit 7 (INT3) external INT3 pin interrupt flag.

• High to low edge trigger , Refer to the Interrupt subsection.

• IOCF is the interrupt mask register. User can read and clear.

14.R10~R3F (General Purpose Register)

• R10~R3F (Banks 0~3) all are general purpose registers.

VII.2 Special Purpose Registers

1. A (Accumulator)

• Internal data transfer, or instruction operand holding

• It’s not an addressable register.

2. CONT (Control Register)

7

6

5

4

3

-

INT

TS

-

PAB

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

PSR2

0

0

0

0

1

1

1

1

PSR1

0

0

1

1

0

0

1

1

PSR0

0

1

0

1

0

1

0

1

TCC Rate

1:2

1:4

1:8

1:16

1:32

1:64

1:128

1:256

• Bit 3 ( PAB ) : Prescaler assignment bit

0/1: TCC/WDT

• Bit 4 : unused

• Bit 5 ( TS ) : TCC signal source

0 : internal instruction cycle clock

1 : 16.38KHz

2

PSR2

1

PSR1

WDT Rate

1:1

1:2

1:4

1:8

1:16

1:32

1:64

1:128

• Bit 6 (INT) : INT enable flag

0 : interrupt masked by DISI or hardware interrupt

1 : interrupt enabled by ENI/RETI instructions

• Bit 7 : unused

• CONT register is readable and writable.

0

PSR0

* This specification is subject to be changed without notice.

4.17.2000 9

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