SC1621

LCD 驱动电路

SC1621 Commanded Formant

The SC1621 can be configured by the S/W setting. There

are two mode commands to configure the SC1621 resources

and to transfer the LCD display data. The configuration mode

of the SC1621 is called command mode, and its command

mode ID is 1 0 0. The command mode consists of a system

configuration command, a system frequency selection

command, a LCD configuration command, a tone frequency

selection command, a timer/WDT setting command, and an

operating command. The data mode, on the other hand,

includes READ, WRITE, and READ-MODIFY-WRITE

operati

ons.

The

followi

ng are

the data mode IDs and the command mode ID:

Operation

Mode

ID

Data

READ

110

Data

WRITE

101

Data

READ-MODIFY-WRITE

101

COMMAND

Command

100

The mode command should be issued before the data or command is transferred. If successive commands have been issued,

the command mode ID, namely 1 0 0, can be omitted. While the system is operating in the non-successive command or the

non-successive address data mode, the CS- pin should be set to “1” and the previous operation mode will be reset also. Once the

CS- pin returns to “0” a new operation mode ID should be issued first.

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