ST7FDALI View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST7FDALI
STMicroelectronics
'ST7FDALI' PDF : 141 Pages View PDF
ST7DALI
11.4 DALI COMMUNICATION MODULE
11.4.1 Introduction
The DALI Communication Module (DCM) is a seri-
al communication circuit designed for controllable
electronic ballasts. Ballasts are the devices used
to provide the required starting voltage and operat-
ing current for fluorescent, mercury, or other elec-
tric-discharge lamps. The DCM supports the DALI
(Digital Addressable Lighting Interface) communi-
cations standard (IEC standard).
11.4.2 Main Features
– 8-bit forward address register for addressing
up to 64 digital ballasts
– 1.2 kHz transmission rate ±10%
– 8-bit forward and backward data registers for
bi-directional communications
– Maskable interrupt
Figure 41. Dali Communication Module Block Diagram
fCPU
4-bit sample
clock counter
1/N
1/16
16-bit Shift Register
4-bit Pre-shift
Register
fDALI
DALIOUT
DALIIN
8-bit DCMCLK
Register
8
8-bit DCMFA
Register
8
8-bit DCMFD
Register
8
8-bit DCMBD
Register
fCPU
Edge
Detector
Arbitration &
Error Detection
ITE ITF EF
RTF
CK3
CK2
CK1
CK0
DCMCSR
Register
DCM Interrupt Request
0
0
0
0
DCME RTA
RTS FTS
DCMCR
Register
Note: The 4-bit preshift register is always active,
except when in Halt mode or if the DCME bit = 0.
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