Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
3
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Table 48.
1.4
2017-03-01
Geely YANG
Deleted the LTE band TDD B41 of EC21-CT
1.5
2018-03-05
Annice ZHANG/
Lyndon LIU/
Frank WANG
1. Updated functional diagram in Figure 1.
2. Updated frequency bands in Table 1.
3. Updated UMTS and GSM features in Table 2.
4. Updated description of pin 40/136/137/138.
5. Updated PWRKEY pulled down time to 500ms in
chapter 3.7.1 and reference circuit in Figure 10.
6. Updated reference circuit of (U)SIM interface in
Figure 17&18.
7. Updated reference circuit of USB interface in Figure
19.
8. Updated PCM mode in Chapter 3.12.
9. Updated USB_BOOT reference circuit in Chapter
3.20.
10. Added SD card interface in Chapter 3.13.
11. Updated module operating frequencies in Table 26.
12. Updated EC21 series modules current consumption
in Chapter 6.5.
13. Updated EC21 series modules conducted RF
receiving sensitivity in Chapter 6.6.
14. Added thermal consideration description in Chapter
6.8.
15. Updated dimension tolerance information in
Chapter 7.
16. Added storage temperature range in Table 2 and
Chapter 6.3.
17. Updated RF output power in Table 42.
18. Updated antenna requirements in Table 29.
19. Updated GPRS multi-slot classes in Table 55.
20. Updated storage information in Chapter 8.1