stled325 STMicroelectronics, stled325 Datasheet - Page 8

• Manufacturer Part Number: stled325
• Description: I?c Interfaced, Advanced Led Controller/driver With Keyscan, Standby Power Management And Real Time Clock Rtc
• Manufacturer: STMicroelectronics

Functional and application diagram
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Functional and application diagram
Figure 1.
ISET
WAKE_UP
Vcc
KEY1-KEY2
GPIO1
GPIO2
VREG
MUTE
SDA
SCL
XOUT
Functional block diagram
Current
regulator
source
Voltage
XIN
2
2
(Fixed
Serial
Freq)
OSC
Seria
I2C
OSC
l I/F
SPI
I/F
32KHz
RTC +
Osc
segments
Output
Internal
VBAT
supply
core
Doc ID 17576 Rev 1
IR_IN
KeyData Mem
KeyData Mem
Display Mem
Display Mem
Key Scan &
Key Scan &
Timing Gen
Timing Gen
Command
Command
(20 x 16)
Dimming
Dimming
Decoder
Decoder
(2 x 12)
(2 x 8)
(5 x 8)
decoder
RC
and UVLO
Soft-start
Bandgap
POR &
Register
Register
READY
output
16- bit
Shift
latch
8-bit
20- bit
5 - bit
Shift
Output
Latch
Internal
Detect
management
reset
VCC
Power
Detect
Vbat
8
5
protection
STDBY
Remote Ctrl
Thermal
Decoder &
Guard
timer
(0V)
GND
SEG1/KS1
SEG8/KS8
DIG1
DIG5
STLED325
DIG4
AM04143V1
IRQ_N