HT1632C(2015) View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT1632C
(Rev.:2015)

32×8 & 24×16 LED Driver

Holtek Semiconductor 

HT1632C

Name

EXT CLK

Master Mode

ID

Command Code

1 0 0 0001-11XX-X

COM Option

1 0 0 0010-abXX-X

PWM Duty

1 0 0 101X-0000-X

1 0 0 101X-0001-X

1 0 0 101X-0010-X

1 0 0 101X-0011-X

1 0 0 101X-0100-X

1 0 0 101X-0101-X

1 0 0 101X-0110-X

1 0 0 101X-0111-X

1 0 0 101X-1000-X

1 0 0 101X-1001-X

1 0 0 101X-1010-X

1 0 0 101X-1011-X

1 0 0 101X-1100-X

1 0 0 101X-1101-X

1 0 0 101X-1110-X

1 0 0 101X-1111-X

Note: X: Don′t care

A6~A0: RAM addresses

D3~D0: RAM data

D/C: Data/command mode

Default: Power on reset default

D/C

Function

Set master mode and clock source from

C

external clock, the system clock input from

OSC pin and synchronous signal output to

SYN pin

ab=00: N-MOS open drain output and

8 COM option

ab=01: N-MOS open drain output and

C

16 COM option

ab=10: P-MOS open drain output and

8 COM option

ab=11: P-MOS open drain output and

16 COM option

C PWM 1/16 duty

C PWM 2/16 duty

C PWM 3/16 duty

C PWM 4/16 duty

C PWM 5/16 duty

C PWM 6/16 duty

C PWM 7/16 duty

C PWM 8/16 duty

C PWM 9/16 duty

C PWM 10/16 duty

C PWM 11/16 duty

C PWM 12/16 duty

C PWM 13/16 duty

C PWM 14/16 duty

C PWM 15/16 duty

C PWM 16/16 duty

Default

ab

=00

Yes

All the bold forms, namely 1 1 0, 1 0 1, and 1 0 0, are mode commands. Among these, 1 0 0 indicates the

command mode ID. If successive commands have been issued, the command mode ID except for the first

command will be omitted. The source of the tone frequency and of the time base clock frequency can be de-

rived from an on-chip RC oscillator or an external clock. Calculation of the frequency is based on the system

frequency sources as stated above. It is recommended that the host controller should initialize the HT1632C

after power on reset, for power on reset may fail, which in turn leads to the malfunction of the HT1632C

Rev. 1.60

21

August 19, 2015

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