HM17CM256 datasheet(72/111 Pages) HYNIX

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HM17CM256

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(34-23)Set read address of internal register

RE2

RE1

RE0

RA3

RA2

RA1

RA0

( reset :{RA3, RA2, RA1, RA0}=BH)

Before executing the internal register data read command the address of register should be specified

first.

For example, when display control (1) is being read out, { RA3, RA2, RA1, RA0 } = 8H should be

specified first.

Because selected register is corresponded with RE flag, please set RE flag first and then read out the

Refer to the command function description and the lists of commands for the address of each register.

(34-24) Internal register data read

RE2

RE1

RE0

0/1

Internal register data read

* : “Don’t care”

This command is used to read out internal register data.

Before executing this command, RE flag and

the address for internal register to read should be set first.

(34-25) Window end X address set

RE2

RE1

RE0

EX3

EX2

EX1

EX0

( reset :{EX3~EX0}=0H, read address :0H)

RE2

RE1

RE0

EX6

EX5

EX4

( reset :{EX6~EX4}=0H, read address :1H)

* : “Don’t care”

When the window area of RAM is specified(WIN=“1”) to access, the end X address of the window is set

by this command.

The lower 4 bits of address should be set first and then upper 3 bits are set later

(34-26) Window end Y address set

RE2

RE1

RE0

EY3

EY2

EY1

EY0

( reset :{EY3~EY0}=0H, read address :2H)

RE2

RE1

RE0

EY6

EY5

EY4

( reset :{EY6~EY4}=0H, read address :3H)

* : “Don’t care”

When window area of RAM is specified(WIN=“1”) to access , the end Y address of the window is set by

this command.

The lower 4 bits of address should be set first and then upper 3 bits are set later.

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