EM78P813

8-bit OTP Micro-controller

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* This specification is subject to change without notice.

17

2004/8/19

(V1.6)

C1P2

C1P1

C1P0

COUNTER1

0

0

0

1:2

0

0

1

1:4

0

1

0

1:8

0

1

1

1:16

1

0

0

1:32

1

0

1

1:64

1

1

0

1:128

1

1

1

1:256

Bit 3 (CNT1S) : Counter1 clock source

0/1

16.384kHz/instruction clock

Bit 4~Bit 6(C2P0~C2P2) : Counter2 scaling. Prescaler is as different as Bit 0~Bit 2.

C2P2

C2P1

C2P0

COUNTER2

0

0

0

1:2

0

0

1

1:4

0

1

0

1:8

0

1

1

1:16

1

0

0

1:32

1

0

1

1:64

1

1

0

1:128

1

1

1

1:256

Bit 7 (CNT2S) : Counter2 clock source

0/1

16.384kHz/instruction clock

PAGE2 Counter 1 Low 8bit Data buffer

7

6

5

4

3

2

1

0

CN17

CN16

CN15

CN14

CN13

CN12

CN11

CN10

Bit 0~Bit 7(CN10~CN17) : Counter1's data buffer

User can switch Counter1 between 8 bits or 16 bits counter by setting Control register bit 4. When CNT1BS set

to 0, counter1 is a 8 bits up-counter with 8-bit prescaler that user can use R5 page2

to preset and read the counter.

( write = preset). Else counter1 will be a 16 bits up-counter with 8-bit prescaler and user can read or write the counter

through R5 page2 and R6 page2. After a interruption, it will reload the preset value.

Example: write:

MOV

0x05,A

; write the data at accumulator to counter1 (preset)

Example: read:

MOV

A,0x05

; read R5 data and write to accumulator

Example: write:

MOV

0x06,A

; write the data(high 8 bits) at accumulator to counter1

Example: read:

MOV

A,0x06

; read R6 data(high 8 bits) and write to accumulator

PAGE3 Current DA Control

7

6

5

4

3

2

1

0

X

X

X

X

CDAS

CDAL2

CDAL1

CDAL0

R-X

R-X

R-X

R-X

R/W-0

R/W-0

R/W-0

R/W-0

Bit 0 ~ Bit 2 (DAL0 ~ DAL2) : change output level of current DA

CDAL2

CDAL1

CDAL0 Output level

0

0

0

L0 (ratio = 1/8)

0

0

1

L1 (ratio = 2/8)

0

1

0

L2 (ratio = 3/8)

0

1

1

L3 (ratio = 4/8)

1

0

0

L4 (ratio = 5/8)

1

0

1

L5 (ratio = 6/8)

1

1

0

L6 (ratio = 7/8)

1

1

1

L7 (ratio =1)