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STFPC311 Datasheet(PDF) 4 Page - STMicroelectronics

Part # STFPC311
Description  Front panel controller/driver with standby power management
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STFPC311 Datasheet(HTML) 4 Page - STMicroelectronics

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1 Functional description
STFPC311
4/39
1
Functional description
The STFPC311 receives serial data from the microcontroller through the SPI interface, latches
the data, and then masks the inputs from the MCU. This data consists of commands followed
by data. There are 4 types of commands:
●
configuration,
●
data,
●
address, and
●
display.
The STFPC311 integrates the supply standby power management functionality, remote control
decoder, and a 28-bit VFD driver. Microcontrollers usually run the first two tasks.
This device reduces the stand-by power consumption of the whole Front Panel application as
well as the hardware by integrating the infrared (IR) remote control decoder.
A dedicated supply voltage powers the STFPC311 directly from the main supply board. When
power is plugged in, control of the power supply management is done using the following pins:
1.
STBY,
2.
IR_DATA_IN, and
3.
READY.
1.1
Block diagram
Figure 1.
Block diagram
SEG13/GRID16
2
2
CLK
OSC
Display Memory
(20 x 16)
Timing Generator
Key Scan and
Dimming Circuit
20-bit
Output
Latch
16-bit
Shift
Register
Data
Selector
SPI
Serial
I/F
4-bit
Latch
Key Data Memory
(2 x 12)
KEY1
KEY2
20
12
8
8
8
8
16
LED2
LED1
V
DD
(+3.3V)
GND
(0V)
V
SS
(-30V)
GRID1
GRID8
SEG20/GRID9
SEG12/KS2
SEG1/KS1
V
DD
IR_DATA_IN
MUTE
STBY
R
OSC
Command Decoder
Remote Control
Decoder & Stand
By Function
READY/STBY_n
Watchdog
Timer
D
OUT
STB
LED3
LED4
2-bit
Latch
SW1
SW2
D
IN
SEG13/GRID16
2
2
CLK
OSC
Display Memory
(20 x 16)
Timing Generator
Key Scan and
Dimming Circuit
20-bit
Output
Latch
16-bit
Shift
Register
Data
Selector
SPI
Serial
I/F
4-bit
Latch
Key Data Memory
(2 x 12)
KEY1
KEY2
20
12
8
8
8
8
16
LED2
LED1
V
DD
(+3.3V)
GND
(0V)
V
SS
(-30V)
GRID1
GRID8
SEG20/GRID9
SEG12/KS2
SEG1/KS1
V
DD
IR_DATA_IN
MUTE
STBY
R
OSC
Command Decoder
Remote Control
Decoder & Stand
By Function
READY/STBY_n
Watchdog
Timer
D
OUT
STB
LED3
LED4
2-bit
Latch
SW1
SW2
D
IN
2
2
CLK
OSC
Display Memory
(20 x 16)
Timing Generator
Key Scan and
Dimming Circuit
20-bit
Output
Latch
16-bit
Shift
Register
Data
Selector
SPI
Serial
I/F
4-bit
Latch
Key Data Memory
(2 x 12)
KEY1
KEY2
20
12
8
8
8
8
16
LED2
LED1
V
DD
(+3.3V)
GND
(0V)
V
SS
(-30V)
GRID1
GRID8
SEG20/GRID9
SEG12/KS2
SEG1/KS1
V
DD
IR_DATA_IN
MUTE
STBY
R
OSC
Command Decoder
Remote Control
Decoder & Stand
By Function
READY/STBY_n
Watchdog
Timer
D
OUT
STB
LED3
LED4
2-bit
Latch
SW1
SW2
D
IN



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