PT6311-LQ PTC [Princeton Technology Corp], PT6311-LQ Datasheet - Page 11

• Manufacturer Part Number: PT6311-LQ
• Description: VFD Driver/Controller IC
• Manufacturer: PTC [Princeton Technology Corp]

LED DISPLAY
PT6311 provides 5 LED Display Terminals, namely LED1 to LED5. Data is written to the LED Port starting from the least
significant bit (b0) of the port using a WRITE Command. Each bit starting from the least significant (b0) activates a
specific LED Display Terminal -- b0 corresponds LED1 Display, b1 activates LED2 and so forth. Since there are only 5
LED display terminals, bits 6 to 8 (b5 ~ b7) are not used and therefore ignored. This means that b5 to b7 does NOT in
anyway activate any LED Display, they are totally ignored.
Display is turned OFF. For example, Bit 1 (as designated by b0) has the value of “0”, then this means that LED1 is ON.
It must be noted that when power is turned ON, bit 5 to bit 1 (b4 to b0) are given the value of “1”. Please refer to the
diagrams below:
SWITCH DATA
PT6311 provides 4 Switch Inputs, namely: SW1 to SW4. SW Data is read starting from the least significant bit (b0) using
a READ Command. Each bit starting from the least significant (b0) corresponds to a specific Switch Input -- b0
corresponds SW1, b1 to SW2 and so forth. Since there are only 4 Switch Inputs, Bits 5 to 8 (b4 to 7) are given the value
of “0”. Please refer to the diagram below.
V3.2
When a bit (b0 ~ b4) in the LED Port is “0”, the corresponding LED is ON. Conversely, when the bit is “1”, the LED
MSB
MSB
0
-
Not Used
0
-
0
-
0
-
b3
b3
b2
b2
b1
b1
b0
b0
LSB
LSB
LED1
LED2
LED3
LED4
LED5
SW1
SW2
SW3
SW4
11
November 2009
PT6311