HT16511 查看數據表（PDF） - Holtek Semiconductor
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HT16511 Datasheet PDF : 12 Pages
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HT16511
The key matrix is made up of a 12´4 matrix, as shown below.
S 1/ S 2/ S 3/ S 4/ S 5/ S 6/ S 7/ S 8/ S 9/ S 10/ S 11/ S 12/
K1
K2
K3
K4
K5
K6
K7
K8
K9
K 10 K 11 K 12
K0
K1
K2
K3
D e ta il
K e y m a tr ix
The data of each key is stored as illustrated below, and
is read with the read command, starting from the least
significant bit.
K 0~K 3
S 1 /K 1
S 3 /K 3
S 5 /K 5
S 7 /K 7
S 9 /K 9
S 1 0 /K 1 0
K 0~K 3
S 2 /K 2
S 4 /K 4
S 6 /K 6
S 8 /K 8
S 1 0 /K 1 0
S 1 2 /K 1 2
R e a d in g s e q u e n c e
b0 b1 b2 b3 b4 b5 b6 b7
LED Port
The LED port belongs to the CMOS output configura-
tion.
Data is written to the LED port with the write command,
starting from the least port¢s least significant bit. In our
application (see application circuits), the user adopts an
internal NMOS device to a driver LED component by
connecting VDD. When a bit of this port is 0, the corre-
sponding LED lights; when the bit is 1, the LED turns off.
The data of bits 6 through 8 are ignored.
M SB
LS B
b4 b3 b2 b1 b0
LE D 0
D o n 't c a r e
LE D 1
LE D 2
LE D 3
LE D 4
SW Data
The HT16511 provides an extra 4-bit general input port.
The SW data is provided with available binary code. The
SW data is read with the read command, starting from
the least significant bit. Bits 5 through 8 of the SW data
are 0.
M SB
00
LS B
0 0 b3 b2 b1 b0
SW 0
D o n 't c a r e
SW 1
SW 2
SW 3
Commands
Commands set the display mode and status of the VFD
driver.
The first 1 byte input to the HT16511 through the DI pin
after the CS pin has fallen, is regarded as a command. If
CS is set high while commands/data are transmitted,
serial communication is initialized, and the commands/
data being transmitted are not valid (however, the com-
mands/data previously transmitted remains valid).
· Display mode setting commands
These commands initialize the HT16511 and select
the number of segments and the number of grids
(1/8~1/16 duty, 12 segments to 20 segments).
When these commands are executed, the display is
forcibly turned off, and key scanning is also stopped.
To resume display, the display command ²ON² must
be executed. If the same mode is selected, nothing
happens.
Rev. 1.10
6
September 18, 2003
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