Pin Assignment

Pin Description

Pad Name

I/O

Description

OUTBIT0~OUTBIT23

O

Line drivers. These pins drive the LEDs.

OUTBIT24/COM15~

OUTBIT31/COM8

O

Drive LED output or Common output

COM0~COM7

O

Common outputs

SYNC

I/O

Cascade synchronization input and output

OSC

I/O

If the system clock is is sourced from an external clock source, the external clock

source should be connected to this pad. If the on-chip RC oscillator is selected,

this pad can be connected to a high or low level. If the cascade mode is selected,

this pad is the driver clock signal.

DATA

I/O

Serial data input or output with pull-high resistor

WR

I

WRITE clock input with pull-high resistor Data on the DATA lines are latched into

the HT1632 on the rising edge of the WR signal.

RD

I

READ clock input with pull-high resistor. The HT1632 RAM data is clocked out on

the falling edge of the RD signal. The clocked out data will appear on the DATA

line. The host controller can use the next rising edge to latch the clocked out data.

CS

I

Chip select input with pull-high resistor When the CS line is high, the data and

command read from or written to the HT1632 is disabled, and the serial interface

circuit is also reset. If CS is low, the data and command transmission between the

host controller and the HT1632 are all enabled.

LED_VSS

¾

Negative power supply for driver circuit, ground.

VSS

¾

Negative power supply for logic circuit, ground.

VDD

¾

Positive power supply for logic and driver circuit.

HT1632

Rev. 1.00

2

October 2, 2007

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2

3 4

3 5

3 6

3 7

3 8

3 9

4 8

4 9

5 0

5 1

5 2

2 3 2 4 2 5 2 6

2 7

2 8

2 9

3 0

3 1

3 2

3 3

4 0

4 1

4 2

4 3

4 4

4 5

4 6

4 7

H T 1 6 3 2

5 2 Q F P - A

O U T B I T 1 1

O U T B I T 1 0

O U T B I T 9

O U T B I T 8

O U T B I T 7

O U T B I T 6

O U T B I T 5

O U T B I T 4

L E D _ V S S

O U T B I T 3

O U T B I T 2

O U T B I T 1

O U T B I T 0

O U T B I T 2 3

O U T B I T 2 4 / C O M 1 5

O U T B I T 2 5 / C O M 1 4

O U T B I T 2 6 / C O M 1 3

O U T B I T 2 7 / C O M 1 2

L E D _ V S S

O U T B I T 2 8 / C O M 1 1

O U T B I T 2 9 / C O M 1 0

O U T B I T 3 0 / C O M 9

O U T B I T 3 1 / C O M 8

C O M 7

C O M 6

C O M 5