HD61202U Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics

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HD61202U

Dot Matrix Liquid Crystal GraphicDisplay Column Driver

Hitachi -> Renesas Electronics 

HD61202U

Busy Flag

Busy flag = 1 indicates that HD61202U is operating and no instructions except status read instruction can

be accepted. The value of the busy flag is read out on DB7 by the status read instruction. Make sure that

the busy flag is reset (0) before issuing instructions.

D/I

R/W

E

Address

Output

register

DB0–DB7

N

N+1

N+2

Busy

check

Write

address N

Busy

check

Read data

(dummy)

Data at address N Data at address N + 1

Busy

check

Read

data at

address N

Busy

check

Data read

address

N+1

Figure 1 MPU Read Timing

E

Busy

flag

T Busy

1/fCLK ≤ T Busy ≤ 3/fCLK

fCLK is ø1, ø2 frequency

Figure 2 Busy Flag

825

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