Rev. 1.00

26

November 16, 2011

HT16L21

Frame Frequency Command

Thiscommandselectstheframefrequency.

Function

Byte (MSB)

Bit7

Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 (LSB)

Bit0 Note R/W Def

Frame frequency command

1

0

0

0

0

1

1

0

—

W

—

Frame frequency setting

X

X

X

X

X

X

F1

F0

—

W

02H

Note:

Bit [1:0]

Frame Frequency

F1, F0

00

85.3Hz

01

170.6Hz

10

64Hz

11

128Hz

● Power on status: Frame frequency is set to 64Hz.

● If the programmed command is not defined, the function will not be affected.

Blinking Frequency Command

Thiscommanddefinestheblinkingfrequencyofthedisplaymodes.

Function

Byte (MSB)

Bit7

Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 (LSB)

Bit0 Note R/W Def

Blinking frequency command

1

0

0

0

1

0

0

0

—

W

—

Blinking frequency setting

X

X

X

X

X

X

BK1

BK0

—

W

00H

Note:

Bit

Blinking Frequency

BK1

BK0

0

0

Blinking off

0

1

2Hz

1

0

1Hz

1

1

0.5Hz

● Power on status: Blinking function is switched off.

● If the programmed command is not defined, the function will not be affected.

LED Output Command

Thiscommanddefinestheblinkingfrequencyofthedisplaymodes.

Function Byte (MSB)

Bit7

Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 (LSB)

Bit0

Note

R/W Def

LED output

command

1

0

0

0

1

1

0

0

—

W —

LED output

data

X

X

X

X

LED3 LED2 LED1 LED0 When [SP1:SP0]=10 used

W 00H

LED7 LED6 LED5 LED4 LED3 LED2 LED1 LED0 When [SP1:SP0]=11 used

Note:

● The LED registers and latches are cleared after a new configuration is written into the SP1 and SP0 bits in the

Drive Mode command.

● If the programmed command is not defined, the function will not be affected.