HT16523 查看數據表（PDF） - Holtek Semiconductor

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HT16523

5x7 Dot Character VFD Controller & Driver

Holtek Semiconductor 

HT16523

Number of Digits Set Command

Byte R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

1st W 1

0

1

*

* K2 K1 K0

*: Don’t care

The number of digits set command descriptions is are

described by the following:

• K2~K0: number of digit selections

• The number of display digits can be from 9 to 16

digits using the 3 selection bits.

• The relationship between setup data and the

displayed grid is shown in the table.

HEX

K2

K1

K0

Number of

Digits of Grid

Comment

Default state when power is

0 0 0 0 G1 to G16 applied or when the RST input is

at a low level.

1 0 0 1 G1 to G9

—

2 0 1 0 G1 to G10

—

3 0 1 1 G1 to G11

—

4 1 0 0 G1 to G12

—

5 1 0 1 G1 to G13

—

6 1 1 0 G1 to G14

—

7 1 1 1 G1 to G15

—

All Display Lights On/Off Set Command

Byte R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

1st W 1

1

0

*

D

S

H

L

*: Don’t care

The display ON/OFF set command descriptions are

described by the following:

• S bit: S=“1” is standby mode; S=“0” is normal

mode

• D bit: D=“1” is display ON; D=“0” is display OFF

• H bit: set all lights ON

• L bit: set all lights OFF

• When S bit = “1”, the internal oscillator stops and

all outputs are set to low and the general port is set

to high (P2 and P1 are all at high levels)

• When S bit = “1”, all registers will keep their

original value

• After being woken up, the device will set the S and

D bits to “0”

• The “All display lights ON” command is used

primarily for display testing

• The “All display lights OFF” command is primarily

used for display flashing

• The command bits, including D, H and L bits,

cannot control the general output port

• The relationship between the control bits and

display state of G1~G16, S1~S35 and AD1~AD2

pins is shown in the table.

DSHL

Driver Output Status

Comment

1 0 0 0 Normal display

—

Sets all segments and Sets all

1

0

0

1

segments and AD to Low.

All grids maintain scan

—

General ports active AD to Low

Sets all segments and AD to High

1 0 1 * All grids maintain scan

—

General ports active

Display off mode

Sets all segments and AD to Low (Default state when

0 0 * * Sets all grids to Low

power is applied or

General ports active

when the RST input

is at a low level.)

Sets all segments and AD to Low.

* 1 * * Sets all grids to Low.

Standby mode

Set General ports to high.

*: Don’t care

Wake-up Setting

The wake-up behavior is described by the following:

• The device is woken up when a CS low pulse is

asserted i.e. when a CS signal falling edge occurs.

• The D and S control bits described in the preceding

section will be set to “0” - display off mode

• The oscillator starts to oscillate after wake-up

• The VFD driver does not display until the host

MCU transmits commands to it.

Wake-up

CS

SCK

SI

TEST Command

Byte R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

1st W 1

1

1

0

0

0

0

0

The TEST command is described by the following:

• Only when the TEST pin is high is the TEST

command “E0H” is valid

• This command is used by HOLTEK for internal

testing.

Rev. 1.00

18

January 18, 2012

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