HT113FA Holtek Semiconductor Inc, HT113FA Datasheet - Page 2

• Manufacturer Part Number: HT113FA
• Description: Submarine War LCD Game
• Manufacturer: Holtek Semiconductor Inc

Functional Description
Key description
RESET
When this key is pressed, the game is re-initi-
ated and all the records are cleared to zero.
When the ON/OFF and RESET keys are
pressed at the same time, and then the RE-
SET key is released, all the pattern dots are
shown on the screen until the ON/OFF key is
released. This function is for LCD testing.
MUTE
This key is pressed to alternately put the
music in the OFF or ON modes.
START/PAUSE
This key can function differently depending
on the following three conditions. First, the
START/PAUSE key is a restart key. When the
game is over, pressing this key re-starts the
game. At this time, the highest game level and
score achieved are still saved. Next, it func-
tions as a continue key. After the game is over,
pressing the START/PAUSE and UP keys at
the same time continues the game from the
level previously achieved. Nonetheless, the
score is cleared to zero. Finally, the
START/PAUSE key is a pause key. When the
game is in progress, pressing this key pauses
the game and the score and game level are
alternately displayed on the LCD. To continue
the game, press the START/PAUSE key
again. At this time, the MUTE, ON/OFF and
START/PAUSE are in effect.
ON/OFF
This key is pressed to alternately turn the
power off or on. When the game is in the
PAUSE mode, pressing the ON/OFF key
switches the power off. To turn on the power,
re-press the ON/OFF key. At this time, the
game still remains in the PAUSE mode.
MISSILE
When this key is pressed, a missile is fired.
TORPEDO
When this key is pressed, a torpedo is fired.
2
Operational description
LEFT
When this key is pressed, the player’s subma-
rine moves to the left.
RIGHT
When this key is pressed, the player’s subma-
rine moves to the right.
UP
When this key is pressed, the player’s subma-
rine moves up.
DOWN
When this key is pressed, the player’s subma-
rine moves down.
Press the ON/OFF key to turn the power on.
Then, the game goes into the DEMO mode. To
play the game, press the START/PAUSE key.
At this time, the highest game level and score
achieved are displayed on the LCD. The game
comes into play immediately after the game
level 1-1 and the initial zero score are shown.
Notice that when the game is in progress, the
START/PAUSE key functions as the PAUSE
key until the game is over.
After the music is initiated, the player’s subma-
rine first appears at the lowest right corner of
the LCD. Then, the player’s submarine moves to
the left twice successively and lets off a “TU”
sound. The game goes into a battle state.
The game is divided into nine levels and each
level consists of three rounds. The total num-
ber of games is 27. In the first round, the
enemy’s attack comes from the bombers only.
In the second round, the attack, comes not
only from the bombers but also from the war-
ships. Finally, in the third round, all the en-
emy’s attacks, namely the bombers, warships
and submarines, are included. Each time a
level is completed and the next level starts to
play, the moving speed of the enemy’s attack
increases. In other words, the difficulty of the
game increases with its level. The higher the
level, the more difficult the game becomes.
HT113FA
25th Nov ’98