TLE75008-EMD_15 Datasheet, PDF (25/64 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

TLE75008-EMD
Power Supply
6.1
Operation Modes
TLE75008-EMD has the following operation modes:
• Sleep mode
• Idle mode
• Active mode
• Limp Home mode
The transition between operation modes is determined according to following levels and states:
• logic level at IDLE pin
• logic level at INn pins
• OUT.OUTn bits state
• HWCR.ACT bit state
The state diagram including the possible transitions is shown in Figure 12. The behaviour of TLE75008-EMD as
well as some parameters may change in dependence from the operation mode of the device. Furthermore, due
to the undervoltage detection circuitry which monitors V_S and V_DD supply voltages, some changes within the same
operation mode can be seen accordingly.
The operation mode of the TLE75008-EMD can be observed by:
• status of output channels
• status of SPI registers
• current consumption at VDD pin (I_VDD)
• current consumption at VS pin (I_VS)
The default operation mode to switch ON the loads is Active mode. If the device is not in Active mode and a request
to switch ON one or more outputs comes (via SPI or via Input pins), it will switch into Active or Limp Home mode,
according to IDLE pin status. Due to the time needed for such transitions, output turn-on time t_ON will be extended
due to the mode transition latency.
init
IDLE = „high“
IDLE = „low“
Sleep
INn = „low“
INn = „high“
& IDLE = „low“
Idle
INn = „low“
& V_DD < V_DD(UV)
IDLE = „low“
& INn = „low“
Limp Home
HWCR.ACT = 0
& OUT.OUTn = 0
& INn = „low“
Figure 12
HWCR.ACT = 1
or OUT.OUTn = 1
or INn = „high“
Operation Mode state diagram
Active
Data Sheet
25
IDLE = „high“
IDLE = „low“
& INn = „high“
OpModes.emf
Rev. 1.1, 2015-09-25