Hardware Design V1.00
Table Of Contents
- Version History
- 1. Introduction
- 2. SIM2000S Overview
- 3. Package Information
- 4. Application Interface
- 4.1. Power Supply
- 4.2. Power on/down Scenarios
- 4.3. Power Saving Mode
- 4.4. Serial Port and Debug Interface
- 4.5. RI behaviors
- 4.6. Audio Interfaces
- 4.7. RUIM Card Interface
- 4.8. PCM Interface
- 4.9. Keypad Interface
- 4.10. I2C Bus
- 4.11. General Purpose Input/Output (GPIO)
- 4.12. ADC
- 4.13. PWM
- 4.14. Network Status Indication
- 4.15. NETLIGHT Multiplexing Function
- 4.16. Operating Status Indication
- 4.17. Antenna Interface
- 5. PCB Layout
- 6. Electrical, Reliability and Radio Characteristics
- 7. Manufacturing
- 8. Appendix
Smart Machine Smart Decision
4.8.4. Primary PCM (2048KHz PCM clock)
SIM2000S also supports 2.048 MHz PCM data and sync timing for
υ-law codec. This is called the primary PCM
interface. User can use AT command to take the mode you want as discussed above.
Figure 32: Synchrony timing
Figure 33: EXT CODEC to MODULE timing
Figure 34: MODULE to EXT CODEC timing
Table 23: Timing parameters
Parameter Description Min Typ Max Unit
T(sync) PCMSYNC cycle time 125 s
T(synca) PCMSYNC high time 400 500 ns
T(syncd) PCMSYNC low time 124.5 s
SIM2000S_Hardware_Design_V1.00 37 2014-02-27