Epson RX-8801SA/JE bit, bit, bit, bit, bit, bit, bit, bit, RAM, bit, bit, bit, bit, bit, bit, bit, bit, SEC, MIN, bit, bit, bit, bit, bit, bit, bit, bit, SEC, bit, bit, bit

RX − 8801 SA / JE

8.2.5. RAM register (Reg - 7)

	Address	Function	bit 7	bit 6	bit 5	bit 4	bit 3	bit 2	bit 1	bit 0
	7	RAM	•	•	•	•	•	•	•	•
	• This RAM register is read/write accessible for any data in the range from 00 h to FF h.
8.2.6. Clock counter (Reg - 0 ∼ 2)
	Address	Function	bit 7	bit 6	bit 5	bit 4	bit 3	bit 2	bit 1	bit 0
	0	SEC	{	40	20	10	8	4	2	1
	1	MIN	{	40	20	10	8	4	2	1
	2	HOUR	{	{	20	10	8	4	2	1

∗) "o" indicates write-protected bits. A zero is always read from these bits.

•The clock counter counts seconds, minutes, and hours.

•The data format is BCD format. For example, when the "seconds" register value is "0101 1001" it indicates 59 seconds.

∗ Note with caution that writing non-existent time data may interfere with normal operation of the clock counter.

1) Second counter

Address

Function

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

0

SEC

{

40

20

10

8

4

2

1

•

This second counter counts from "00" to "01," "02," and up to 59 seconds, after which it starts again from

00 seconds.

2) Minute counter

Address

Function

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

1

MIN

{

40

20

10

8

4

2

1

•

This minute counter counts from "00" to "01," "02," and up to 59 minutes, after which it starts again from

00 minutes.

3) Hour counter

Address

Function

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

2

HOUR

{

{

20

10

8

4

2

1

•

This hour counter counts from "00" hours to "01," "02," and up to 23 hours, after which it starts again from

00 hours.

8.2.7. Day counter (Reg - 3)

Address

Function

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

3

WEEK

{

6

5

4

3

2

1

0

∗) "o" indicates write-protected bits. A zero is always read from these bits.

•The day (of the week) is indicated by 7 bits, bit 0 to bit 6.

The day data values are counted as: Day 01h → Day 02h → Day 04h → Day 08h → Day 10h → Day 20h → Day 40h → Day 01h → Day 02h, etc.

•The correspondence between days and count values is shown below.

WEEK	bit 7	bit 6	bit 5	bit 4	bit 3	bit 2	bit 1	bit 0	Day	Data [h]
	0	0	0	0	0	0	0	1	Sunday	01 h
	0	0	0	0	0	0	1	0	Monday	02 h
Write/Read	0	0	0	0	0	1	0	0	Tuesday	04 h
	0	0	0	0	1	0	0	0	Wednesday	08 h
	0	0	0	1	0	0	0	0	Thursday	10 h
	0	0	1	0	0	0	0	0	Friday	20 h
	0	1	0	0	0	0	0	0	Saturday	40 h
	∗ Do not set "1" to more than one day at the same time.
Write prohibit	Also, note with caution that any setting other than the								−	−
	seven shown above should not be made as it may
	interfere with normal operation.

Page - 12 ETM26E-03