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EM78R911

8-bit micro-controller

ELAN Microelectronics 

13. R10~R3F (General Purpose Register)

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

EM78911

8-bit micro-controller

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

2

1

INT_EDGE INT TS TE PAB PSR2 PSR1

* 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 (TE) TCC signal edge

0: increment from low to high transition on TCC

1: increment from high to low transition on TCC

0

PSR0

* Bit 5 (TS) TCC signal source

0: internal instruction cycle clock

1: 16.384KHz

* Bit 6 : (INT)INT enable flag

0: interrupt masked by DISI or hardware interrupt

1: interrupt enabled by ENI/RETI instructions

* Bit 7 : INT_EDGE

0:P70 's interruption source is a rising edge signal.

1:P70 's interruption source is a falling edge signal.

* CONT register is readable and writable.

11

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