PT6314 Datasheet, PDF (5/49 Pages) Texas Instruments – 3 Amp Adjustable Positive Step-down Integrated Switching Regulators

Dot Character VFD Controller/Driver IC
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PT6314
Pin Name I/O
Description
Pin No.
Serial Input/Output Pin
Under the Serial Data Transfer Mode, this pin functions as an I/O
SI/SO
I/O Pin.
15
Under the Parallel Data Transfer Mode, this pin may be connected
to either “H” or “L”
Parallel Data Input/Output Pins
DB0 to DB7
I/O
Under the Parallel Data Transfer Mode, these pins are used as I/O
Pin.
16-23
Under the 4-bit Transfer Mode, DB4 to DB7 are used.
I/F Select Pin
IFSEL
I This pin is used to select the I/F mode: Serial or Parallel Transfer 24
0: Serial Data Transfer 1: Parallel Data Transfer
Interface Select Pin
MCU
I This pin is used to select the interface mode: i80 or M68.
25
0: i80 CPU Mode 1: M68 CPU Mode
/CS
I
Chip Select Pin
When this pin is set to “L” the PT6314 is active.
26
RL1,RL2
I
Segment Output Select Pin
This pins are used to set SG1 to SG80.
27, 28
Extension Grid Driver Clear Signal Output Pin
Active: Low
/CLR
O The Grid Data stored in extension driver latch are outputted
29
when this pin is set to “HIGH”. If this pin is set to ”LOW”, the
extension driver outputs LOW.
LATCH
O Extension Grid Driver Latch Enable Signal Output Pin
30
SDO
O Extension Grid Driver Serial Data Output Pin
31
SLK O
Extension Grid Driver Shift Clock Output Pin
Rising Edge: Active
32
TESTOUT
O
Test Pin for IC Testing only.
This pin should be “open”.
33
VSS1
- Logic Ground Pin
34
GR1 to GR24 O Grid Signal Output Pins
143-120
SG1 to SG80 O Segment Signal Output Pins
see (1)
Note: Refer to Duty Ratio Setting Section
PT6314 V1.3
-5-
March, 2006