Silan

Semiconductors

SC16311

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2001.11.8.

7

KEY1

KEY2

KEY3

KEY4

The data of each key is stored as illustrated below, and is read by a read command, starting from the least

significant bit.

Seg1/KS1

Seg2/KS2

Seg3/KS3

Seg4/KS4

Seg5/KS5

Seg6/KS6

Seg7/KS7

Seg8/KS8

Seg9/KS9

Seg10/KS10

Seg11/KS11 Seg12/KS12

KEY1...KEY4

b0

b3

b4

b7

Reading sequence

KEY1...KEY4

When the most significant bit of data (Seg12 b7) has been read, the least significant bit of the next data (Seg1 b0)

is read.

LED Port

Data is written to the LED port by a write command, starting from the least significant bit of the port. When a bit of

this port is 0, the corresponding LED lights; when the bit is 1, the LED goes off. The data of bits 6 through 8 is

ignored.

--

-

b0

MSB

LSB

Don't care

LED1

b4 b3 b2 b1

LED2

LED3

LED4

LED5

On power application, all the LEDs remain dark.