RA6963 datasheet(13/46 Pages) RAIO

13 / 46 page

Preliminary Version 1.3

Dot Matrix LCD Controller

RAiO TECHNOLOGY INC.

www.raio.com.tw

13/46

RA6963

6-5 Communications with MPU

6-5-1 Status Read

A status check must be performed before data is read or written.

Status Check

The Status of RA6963 can be read from the data lines.

< Table 6-3 >

C/ D

SD[7:0]

Status Word

The RA6963 status word format is as follows:

MSB

LSB

SD7

SD6

SD5

SD4

SD3

SD2

SD1

SD0

STA7 STA6 STA5 STA4 STA3 STA2 STA1 STA0

< Table 6-4 >

STA0

Check command execution capability

0: Disable

1: Enable

STA1

Check data read/write capability

0: Disable

1: Enable

STA2

Check Auto mode data read capability

0: Disable

1: Enable

STA3

Check Auto mode data write capability

0: Disable

1: Enable

STA4

Not used

STA5

Check controller operation capability

0: Disable

1: Enable

STA6

Error flag. Used for Screen copy commands.

0: No error

1: Error

STA7

Check the blink condition

0: Display off

1: Normal display

Note 1: It is necessary to check STA0 and STA1 at the same time.

There is a possibility of erroneous operation due to a hardware interrupt.

Note 2: For most modes STA0 /STA1 are used as a status check.

Note 3: STA2 and STA3 are valid in Auto mode; STA0 and STA1 are invalid.

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