Peripheral Control Module

The following table shows the location of the four bit fields located in LCD control register 2 (LCCR2). The LCD controller must be disabled (LEN=0) when changing the state of any field within this register.

Address: 0h B010 0024

 

 

LCCR2: LCD Controller Control Register 2

 

 

 

Read/Write

 

Bit

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BFW

 

 

 

 

 

 

 

EFW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

-

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

VSW

LPP

Reset

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Bit

Name

Description

 

 

 

9..0

LPP

Lines per panel.

 

 

Value (from 1 to 1024). Used to specify number of lines per panel. For single-panel

 

 

mode, this represents the total number of lines on the LCD display; for dual-panel

 

 

mode, this represents half the number of lines on the whole LCD display.

 

 

Lines/panel = (LPP+1).

 

 

 

15..10

VSW

Vertical sync pulse width.

 

 

In active mode (PAS=1), value (from 1 to 64). Used to specify number of line clock

 

 

periods to pulse the L_FCLK pin at the end of each frame after the end-of-frame wait

 

 

(EFW) period elapses. Frame clock used as VSYNC signal in active mode.

 

 

In passive mode (PAS=0), value (from 1 to 64). Used to specify number of extra line

 

 

clock

 

 

periods to insert after the end-of-frame. Note that the width of L_FCLK is not affected

 

 

by VSW in passive mode and that line clock does not transition during the insertion of

 

 

the extra line clock periods. Also note that both EFW and BFW should be set to zero in

 

 

passive mode.

 

 

VSYNC width = (VSW+1).

 

 

 

23..16

EFW

End-of-frame line clock wait count.

 

 

In active mode (PAS=1), value (from 0 to 255). Used to specify number of line clock

 

 

periods to add to the end of each frame. Note that line clock does transition during the

 

 

insertion of the extra line clock periods. EFW should be cleared to zero (disabled) in

 

 

passive mode.

 

 

 

31..24

BFW

Beginning-of-frame line clock wait count.

 

 

In active mode (PAS=1), value (from 0 to 255). Used to specify number of line clock

 

 

periods to add to the beginning of a frame before the first set of pixels is output to the

 

 

display. Note that line clock does transition during the insertion of the extra line clock

 

 

periods. BFW should be cleared to zero (disabled) in passive mode.

 

 

 

11-38

SA-1100 Developer’s Manual

Page 188
Image 188
Intel SA-1100 manual Lpp, Vsw, Efw, Bfw