TCA5013 Datasheet, PDF (19/68 Pages) Texas Instruments – Feature Rich Smartcard Interface IC

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TCA5013
SCPS253B – JANUARY 2014 – REVISED JANUARY 2016
Device Functional Modes (continued)
8.4.1 Power Off Mode
The TCA5013 is in power off mode when V_DD < V_DDSH or V_DDI < V_DDITH. In power off mode none of the device
features are functional and available for use.
8.4.2 Shutdown Mode
TCA5013 is in shutdown mode when all the below conditions are true.
• V_DD > V_DDSH
• V_DDI > V_DDITH
• SHDN = 0
Shutdown mode is a low power mode where all circuits except card insertion detection circuitry are shutdown.
Even I2C communication is disabled in shutdown mode. The only active circuit in the device is card insertion
detection circuit on the PRES pin (see User Card Insertion / Removal Detection). Shutdown mode is entered
from Active Mode or Standby Mode by asserting the SHDN pin. When entering shutdown mode from Active
Mode all active card interfaces are automatically deactivated.
8.4.3 Standby Mode
The TCA5013 is in standby mode when all the below conditions are true.
• V_DD > V_DDSH
• V_DDI > V_DDITH
• SHDN = 1
• No card interfaces are activated.
In standby mode, the device I²C and card detection circuits are fully functional. All other circuits are ready to be
activated based on I²C commands received from the microcontroller. Standby mode is entered from shutdown
mode by releasing the SHDN pin or from power down mode by powering up the device or from active mode by
deactivating all card interfaces.
8.4.4 Active Mode
The TCA5013 is in active mode when all the below conditions are true.
• V_DD > V_DDSH
• V_DDI > V_DDITH
• SHDN = 1
• At least one card interface is activated
In active mode, the device is fully functional with at least one of the card interfaces activated. The DC-DC
Boost and card LDOs are active and provide power to the card VCC pins of the active card interfaces. Active
mode can only be entered from standby mode by activating one of the card interfaces. When the device is in
active mode, the individual card interfaces can be active in different operating modes. The user card supports
Asynchronous Operating Mode, Synchronous Type 1 Operating Mode,Synchronous Type 2 Operating Mode,
or Manual Operating Mode. The SAM card interfaces can only be activated in asynchronous activation mode.
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