STV9937 datasheet(10/49 Pages) STMICROELECTRONICS

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STV9937

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The transmission formats are as follows:

1. Format A: S-FWR-FAC-D

® FWR-FAC-D ® FWR-FAC-D ® FWR-FAC-D...Stop

2. Format B: S-FWR-FAC-D

® FAC-D ® FAC-D ® FAC-D...Stop

3. Format C: S-FWR-FAC-D

® D ® D ®D...Stop

Where:

S = Slave address = BAh

FWR = Format, Window and Row address

FAC = Format, Attribute and Column address

D = CTRL Control data (8 bits), CB Color codes (3 bits) or RC Character codes (9 bits).

In Format C, the order of automatic incrementation for data D is first the column value, then the row

value, and then the window value.

2.1.3

Format, Window and Row Address (FWR)

Bit 7 indicates the ‘Window & Row’ byte when set to 1.

W[2:0]: Window Number

000: Control Data and Color Codes

001: Window 1

010: Window 2

011: Window 3

100: Window 4

R[3:0]: Row Numbers from 0 to 15. Each window has a maximum number of 16 rows.

2.1.4

Format, Attribute and Column Address (FAC)

Bit 7 indicates the ‘Attribute & Column’ byte when set to 0.

F: Format

0: Format A or B

1: Format C

A: Transmission of character code or color code

0: Character Code

1: Color Code and Character Code MSB

When reading or writing control data and/or character codes, bit A must be set to 0. For color code

and character code MSB, bit A must be set to 1.

Table 2: Various Bytes coded in the I²C Transmission

Byte

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

FWR

W[2:0]

R[3:0]

FAC

C[4:0]

D: Control Data (in window 0 only)

CTRL[7:0]

D: Color Code and Character Code MSB

RC[8]

CB[2:0]

D: Character Code LSBs

RC[7:0]

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