User Guide

GM47/48 Design Guidelines
BA/SEM/MSC 02:0006 Rev PA1 28
32. TIMESTAMP O Dig. 2.75 Timestamp
Timestamp is reserved for future use, if A-
GPS is implemented on network side.
33. LED O Dig. 2.75 Flashing LED
34. VIO O Power Out 2.75 Module powered indication.
The VIO is a 2.75 V output that could
power external devices to transmit data
towards the GSM device to a 75mA max.
35. TX_ON O Dig 2.75 This output shall indicate when the GSM
module is going to transmit the burst.
36. RI O Dig. 2.75 Ring Indicator
37. DTR I Dig. 2.75 Data Terminal Ready
38. DCD O Dig. 2.75 Data Carrier Detect
39. RTS I Dig. 2.75 Request To Send
40. CTS O Dig. 2.75 Clear To Send
41. TD I Dig. 2.75 Transmitted Data
Data from DTE (host) to DCE (module).
[former DTMS]
42. RD O Dig. 2.75 Received Data
Data from DCE (module) to DTE (host).
[former DFMS]
43. TD3 I Dig. 2.75 UART3 Transmission
Data from DTE (host) to DCE (module).
[former DTMS]
44. RD3 O Dig. 2.75 UART3 Reception
Data from DTE (host) to DCE (module).
[former DTMS]
Data from DCE (module) to DTE (host).
[former DFMS]
45. TD2 I Dig. 2.75 UART2 Reception
Former CTMS. Used for flashing
46. RD2 O Dig. 2.75 UART2 Transmission
Data from DCE (module) to DTE (host).
[former DFMS]
Former CFMS. Used for flashing
47. PCMULD I Dig. 2.75 DSP PCM digital audio input
48. PCMDLD O Dig. 2.75 DSP PCM digital audio output
49. PCMO O Dig. 2.75 Codec PCM digital audio output
50. PCMI I Dig. 2.75 Codec PCM digital audio input
51. PCMSYNC O Dig. 2.75 DSP PCM frame sync
52. PCMCLK O Dig. 2.75 DSP PCM clock output
53. MICP I Analogue Microphone input positive
54. MICN I Analogue Microphone input negative
55. BEARP O Analogue Speaker output positive