Telit Wireless Solutions GE865, Руководство пользователя по оборудованию

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GE865 Hardware User Guide
1vv0300799 Rev.17– 2017-05-11
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 53 of 75
•
alternate function (
internally controlled
)
Input pads can only be read ; they report the digital value (
high or low
) present on the pad at the
read time .
Output pads can only be written or queried and set the value of the pad output.
An alternate function pad is internally controlled by the GE865 firmware and acts depending on
the function implemented.
For Logic levels please refer to chapter 8.
The following table shows the available GPIO on the GE865 .
Signal I/O Function Type Input /
output
current
Default
State
ON_OFF
state
State
during
Reset
Note
GPIO_01 I/O GPIO01 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
GPIO_02 I/O GPIO02 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
Alternate function
(JDR)
GPIO_03 I/O GPIO03 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
GPIO_04 I/O GPIO04 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
Alternate function
(RF Transmission
Control)
GPIO_05 I/O GPIO05 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
Alternate function
(RFTXMON)
GPIO_06 I/O GPIO06 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
Alternate function
(ALARM)
GPIO_07 I/O GPIO07 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
Alternate function
(BUZZER)
GPIO_08 I/O GPIO08 Configurable GPIO CMOS 2.8V 1uA/1mA INPUT 0 0
GPIO_09 I/O GPIO09 Configurable GPIO CMOS 2.8V 1 1 1 Open Drain
GPIO_10 I/O GPIO10 Configurable GPIO CMOS 2.8V 1 1 1 Open Drain
Not all GPIO pads support all these three modes:
• GPIO2 supports all three modes and can be input, output, Jamming Detect Output
(Alternate function)
•
GPIO4 supports all three modes and can be input, output, RF Transmission Control
(Alternate function)
•
GPIO5 supports all three modes and can be input, output, RFTX monitor output
(Alternate function)
•
GPIO6 supports all three modes and can be input, output, alarm output (Alternate
function)
• GPIO7 supports all three modes and can be input, output, buzzer output (Alternate
function
11.1. GPIO Logic levels
Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels.
The following table shows the logic level specifications used in the GE865 interface circuits:
Absolute Maximum Ratings -Not Functional