NT7963 datasheet(8/36 Pages) NEOTEC

8 / 36 page

Neotec Semiconductor Ltd.

新德科技股份有限公司

NT7963

LCD Controller

Neotec Semiconductor Ltd.

NT7963-DS_V1.0_20130717

www.neotec.com.tw

8/36

l Flowchart of communications with MPU

(1) Status Read

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

Status check

The Status of NT7963 can be read from the data lines.

/RD

/WR

/CE

C/D

D0 to D7

Status word

The NT7963 status word format is as follows:

MSB

LSB

STA7

STA6

STA5

STA4

STA3

STA2

STA1

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 peek and screen copy

commands

0: No error

1: Error

STA7

Check the blank 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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