BTS 5590G Infineon Technologies, BTS 5590G Datasheet - Page 38

• Manufacturer Part Number: BTS 5590G
• Manufacturer: Infineon Technologies

Specifications of BTS 5590G

• Packages: PG-DSO-36
• Channels: 5.0
• Channel Mix: 2*25mohm+1*40mohm+2*100mohm
• Led Mode: Yes
• Cranking Mode: No
• Pwm Engine Integrated: No

10.2
The SPI of SPOC - BTS5590G provides daisy chain capability. In this configuration several devices are activated
by the same CS signal MCS. The SI line of one device is connected with the SO line of another device (see
Figure
device, MO and MI respectively. The master device provides the master clock MCLK which is connected to the
SCLK line of each device in the chain.
Figure 23
In the SPI block of each device, there is one shift register where one bit from SI line is shifted in each SCLK. The
bit shifted out occures at the SO pin. After eight SCLK cycles, the data transfer for one device has been finished.
In single chip configuration, the CS line must turn high to make the device accept the transferred data. In daisy
chain configuration, the data shifted out at device 1 has been shifted in to device 2. When using three devices in
daisy chain, three times eight bits have to be shifted through the devices. After that, the MCS line must turn high
(see
Figure 24
10.3
Figure 25
Data Sheet
SCLK
SO
CS
SI
Figure
23), in order to build a chain. The ends of the chain are connected with the output and input of the master
t
SO(en)
24).
Daisy Chain Capability
Daisy Chain Configuration
Data Transfer in Daisy Chain Configuration
Timing Diagrams
t
Timing Diagram SPI Access
CS(lead)
MCLK
MCLK
MCS
MO
MCS
time
MI
MO
MI
t
SCLK(H)
t
SO(v)
t
SI(su)
SO device 3
SI device 3
t
SI
SCLK(P)
t
SCLK(L)
t
SI(h)
device 1
SPI
SO
SO device 2
SI device 2
SI
38
device 2
SPI
t
CS(lag)
t
SO(dis)
t
CS(td)
SO
SO device 1
SI device 1
SPI Timing.emf
SI
0.7V
0.2V
0.7V
0.2V
0.7V
0.2V
0.7V
0.2V
dd
dd
dd
dd
dd
dd
dd
dd
device 3
Serial Peripheral Interface (SPI)
SPI
SPI_DasyChain2.emf
SPI_DasyChain.emf
SPOC - BTS5590G
SO
Rev. 1.3, 2007-10-30