7220 datasheet(163/303 Pages) RENESAS

163 / 303 page

M37220M3-XXXSP/FP

4.5 Functional description

4-25

7220 Group User’s Manual

Fig. 4.5.15 CRT control register (address 00EA16)

b7 b6 b5 b4 b3 b2 b1 b0

CRT control register (CC) [Address 00EA 16]

Name

Functions

After reset R W

CRT Control Register

All-blocks display control

bit (Note) (CC0)

0 : All-blocks display off

1 : All-blocks display on

Block 1 display control bit

(CC1)

0 : Block 1 display off

1 : Block 1 display on

0 : Block 2 display off

1 : Block 2 display on

Note: Display is controlled by logical product (AND) between the all-blocks display

control bit and each block control bit.

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

Block 2 display control bit

(CC2)

R—

Fig. 4.5.16 CRT port control register (address 00EC16)

b7 b6 b5 b4 b3 b2 b1 b0

CRT port control register (CRTP) [Address 00EC 16]

Name

Functions

After reset R W

CRT Port Control Register

0HSYNC input polarity

switch bit (HSYC)

0 : Positive polarity

1 : Negative polarity

0 : Positive polarity

1 : Negative polarity

R, G, B output polarity

switch bit (R/G/B)

0 : Positive polarity

1 : Negative polarity

OUT output polarity

switch bit (OUT)

0 : Positive polarity

1 : Negative polarity

R signal output switch bit

(OP5)

0 : R signal output

1 : MUTE signal output

G signal output switch bit

(OP6)

0 : G signal output

1 : MUTE signal output

B signal output switch bit

(OP7)

0 : B signal output

1 : MUTE signal output

VSYNC input polarity

switch bit (VSYC)

Nothing is assigned. This bit is a write disable bit.

When this bit is read out, the value is “0.”

R—

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