User's Manual
Table Of Contents
- Document History
- Introduction
- Product Concept
- Application Interface
- Operating Modes
- Power Supply
- Power Up / Power Down Scenarios
- Automatic GPRS Multislot Class Change
- Charging Control
- Summary of State Transitions (Except SLEEP Mode)
- RTC Backup
- SIM Interface
- Serial Interface ASC0
- Serial Interface ASC1
- USB Interface
- I2C Interface
- Audio Interfaces
- Control Signals
- Antenna Interface
- Electrical, Reliability and Radio Characteristics
- Mechanics
- Sample Application
- Reference Approval
- Appendix
TC63 Hardware Interface Description
Strictly confidential / Draft
s
TC63_HD_V00.432 Page 31 of 97 11.05.2005
VEXT
See note 1
TXD0/TXD1/RTS0/RTS1/DTR0 (driven by the application)
Serial interfaces
ASC0 and ASC1
Undefined
Active
PWR_IND
CTS0/CTS1/DSR0/DTR0
Figure 7: Signal states during turn-off procedure
Note 1: Depending on capacitance load from host application
3.3.2.2 Leakage Current in Power Down Mode
The leakage current in Power Down mode varies depending on the following conditions:
• If the supply voltage at BATT+ was disconnected and then applied again without starting
up the TC63 module, the leakage current ranges between 90µA and 100µA.
• If the TC63 module is started and afterwards powered down with AT^SMSO, then the
leakage current is only 50µA.
Therefore, in order to minimize the leakage current take care to start up the module at least
once before it is powered down.