4116369

Rev 9.0

September 04, 2017

19

2. Pad Definition

AirPrime HL7548 and HL7588 pads are divided into 3 functional categories.

•

modules. These Core functions are always available and always at the same physical pad locations. A customer platform using only these functions

•

Extension functions and associated pads bring additional capabilities to the customer. Whenever an Extension function is available on a module, it

is always at the same pad location.

•

Custom functions and associated pads are specific to a given module, and make an opportunistic use of specific chipset functions and I/Os.

Custom features should be used with caution as there is no guarantee that the custom functions available on a given module will be available on

Other pads marked as “not connected” or “reserved” should not be used.

Table 6.

Pad Definition

Pad #

Signal Name

Function

I/O

Active

Low / High

Power Supply

Domain

Recommendation

for Unused Pads

Type

1

GPIO1

General purpose input/output

I/O

1.8V

Left Open

Extension

2

UART1_RI* /

TRACE_DATA3

UART1 Ring indicator / Trace data 3

O

1.8V

Connect to test point Core / Custom

3

UART1_RTS

UART1 Request to send

I

L

1.8V

Connect to test point Core

4

UART1_CTS

UART1 Clear to send

O

L

1.8V

Connect to test point Core

5

UART1_TX

UART1 Transmit data

I

1.8V

Connect to test point Core

6

UART1_RX

UART1 Receive data

O

1.8V

Connect to test point Core

7

UART1_DTR*

UART1 Data terminal ready

I

L

1.8V

Connect to test point Core

8

UART1_DCD* /

TRACE_DATA1

UART1 Data carrier detect / Trace data 1

O

L

1.8V

Connect to test point Core / Custom