User's Manual
HC864-AUTO Hardware User Guide
1vv0300946 Rev.4 – 2012-12-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 16 of 77
Pin Signal I/O Function
Internal
Pull up
Type
HC864-AUTO
or a peripheral
36
PCM_CLOCK I/O PCM clock out CMOS 2.6V
DAC and ADC
37
ADC_IN1 AI Analog/Digital converter input A/D
38
ADC_IN2 AI Analog/Digital converter input A/D
40
DAC_OUT AO Digital/Analog converter output D/A
Miscellaneous Functions
45
STAT_LED O Status indicator led CMOS 1.8V
46
GND - Ground Ground
48
USB_VBUS AI Power sense for the internal USB transceiver 4.4V ~5.25V
49
PWRMON O Power ON Monitor
1K
Ω
CMOS 2.6V
50
VAUX1 - Power output for external accessories
53
ON/OFF I
Input command for switching power ON or OFF
(toggle command).
The pulse to be sent to the HC864-AUTO must be
equal or greater than 1 second.
Pulled up on
chip
54
RESET I Reset input
55
VRTC AO Power supply for RTC block Power
Telit GPIOs
56
TGPIO_19 I/O Telit GPIO19 Configurable GPIO CMOS 1.8V
57
TGPIO_11 I/O Telit GPIO11 Configurable GPIO CMOS 1.8V
58
TGPIO_20 I/O Telit GPIO20 Configurable GPIO CMOS 1.8V
59
TGPIO_04 I/O Telit GPIO4 Configurable GPIO CMOS 1.8V
60
TGPIO_14 I/O Telit GPIO14 Configurable GPIO CMOS 1.8V
61
TGPIO_15 I/O Telit GPIO15 Configurable GPIO CMOS 1.8V
62
TGPIO_12 I/O Telit GPIO12 Configurable GPIO CMOS 1.8V
63
TGPIO_10/
PCM_TX
I/O
Telit GPIO10 Configurable GPIO / PCM Data
Output
Pull
Down
CMOS 2.6V
64
TGPIO_22 I/O Telit GPIO22 Configurable GPIO CMOS 1.8V
65
TGPIO_18/
PCM_RX
I/O Telit GPIO18 Configurable GPIO / PCM Data input
Pull
Down
CMOS 2.6V
66
TGPIO_03 I/O Telit GPIO3 Configurable GPIO CMOS 1.8V
67
TGPIO_08 I/O Telit GPIO8 Configurable GPIO CMOS 1.8V
68
TGPIO_06 /
ALARM
I/O Telit GPIO6 Configurable GPIO / ALARM CMOS 1.8V
70
TGPIO_01 I/O Telit GPIO1 Configurable GPIO CMOS 1.8V
71
TGPIO_17/
PCM_SYNC
I/O Telit GPIO17 Configurable GPIO / PCM Sync
Pull
Down
CMOS 2.6V
72
TGPIO_21 I/O Telit GPIO21 Configurable GPIO CMOS 1.8V
73
TGPIO_07 I/O Telit GPIO7 Configurable GPIO CMOS 1.8V