D16312
FEATURES
- Multiple display modes (11-segment & 11-digit to 16-segment & 4-digit)
- Key scanning (6 4 matrix)
- Dimming circuit (eight steps)
- High-voltage output (VDD 35 V max).
- LED ports (4 chs., 20 m A max).
- General-purpose input port (4 bits)
- No external resistors necessary for driver outputs (P-ch open-drain + pull-down resistor output)
- Serial interface (CLK, STB, DIN, DOUT)
ORDERING INFORMATION
Part Number Package 44-pin plastic QFP ( 10)
PD16312GB-3B4
Document No. IC-3307 (1st edition) Date Published March 1997 P Printed in Japan
©
PD16312
BLOCK DIAGRAM mand decoder
Dimming circuit
DIN DOUT Serial I/F CLK STB
Seg1 16-bit 16 output latch 5 11 Segment driver Seg11
Display memeory 16 bits × 11 words
.. VDD
R OSC Timing generator key scan Data selector 5
Multip lexed diver
Seg12/Grid11
Seg16/Grid7
Key data memory (4 × 6) Key1 to Key4
11-bit shift register 11
5 Grid1 6 Grid driver Grid6
SW1 to SW4
4-bit latch 4 4-bit latch LED1 LED4 Key data...
