STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 36

• Manufacturer Part Number: STFPC320
• Description: Front Panel Controller/driver With Standby Power Management And Real-time Clock
• Manufacturer: STMicroelectronics

Commands
Description:
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Byte7 is for RTC format configuration:
When b6 is set to a ‘0’, it implies that the dot point/column is a part of the same digit as the
LSB of the HH or LSB of the MM. When b6 is set to a ‘1’, it means that a separate digit is
used for the separator between the hour/minute and minute/second.
When b5 is set to a ‘0’, HH:MM display format of RTC is chosen and when it is set to a ‘1’,
the HH:MM:SS format is chosen.
When b4 is set to a ‘0’, the AM/PM is not displayed and when it is set to a ‘1’, the AM/PM is
displayed on the VFD.
For a display with segment configuration as in above Figure, the location of “a” segment
represented by bits b3-b0 corresponds to “0000”. Location of b segment corresponds to
“0001”. Location of c segment corresponds to “0010” and so on.
Byte2 to byte6 will follow the same pattern as shown for byte1 above:
BYTE2: segment d, segment c
BYTE3: segment f, segment e
BYTE4: segment m, segment g
BYTE5: segment k, segment h
BYTE6: segment p/col , segment j/col
Segments r and n are never used for RTC display.
BYTE1
BYTE7
MSB
MSB
b7
0
b6
b6
Segment b
b5
b5
b4
b4
b3
0
b2
0
Segment a
b1
0
STFPC320
LSB
LSB
b0
b0