Integration Guide

Confidential and Proprietary
Monarch Go-GPS-BLE Datasheet and Hardware Integration Guide, Rev 1
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1.6. Digital board-to-board connector
Notes :
(1) The pin number “1” is located on the side nearest the outer edge of the plastic case as
described below:
(2) "O" in this column means that a pull-up to an always-on voltage supply (Power group) with
typical 100kOhm resistor is an option:
- It is mandatory for designing a compatible host board hosting either Monarch Go-GPS,
Monarch Go-GPS BLE or Monarch Go (LTE only) version, at a degraded standby current.
- If the host board is only for Monarch Go-GPS or Monarch Go-GPS BLE, pull-up resistors
are not needed.
See section 2.1 for more details.
(3) Note the pin characteristics (name, function, …) of the pin number 16 to 20 are different versus
the digital board-to-board connector of the Monarch Go (LTE Only) version.
Pin number (1)(3) Direction Pin name Function Description
Power
group
State
@reset
Pull-up on
host board (2)
1 IN VCC Power supply Voltage level 3.1V to 5.5V n/a n/a
2 IN GND Ground n/a n/a
3 IN GND Ground n/a n/a
4 IN nRESET Reset Reset signal. Active low. 3.1V In, PU O
5 IN UART1_TXD Main UART1 TXD Main UART: Host board sends data to Monarch Go-GPS. 1.8V In, PU
6 OUT UART1_RXD Main UART1 RXD Main UART: Monarch Go-GPS sends data to Host board. 1.8V In, PU
7 IN UART1_RTS Main UART1 RTS
Main UART: Hardware flow control signals. Active low. UART1_RTS is
used to wake-up Monarch Go-GPS from Host board.
1.8V In, PU O
8 OUT UART1_CTS Main UART1 CTS 1.8V In, PU O
9 OUT RING RING signal
This signal indicates a URC from Monarch Go-GPS and shall be read
by host board. Active low.
1.8V In, PU O
10 IN WAKE Wake-up signal Disabled by default. Connect to headers. 1.8V In, PD
11 OUT POWER_STATUS Power Saving Status Disabled by default. Connect to headers. 1.8V In, PD
12 IN UART2_TXD Debug UART2 TXD 1.8V In, PU
13 OUT UART2_RXD Debug UART2 RXD 1.8V In, PU
14 IN UART2_RTS Debug UART2 RTS 1.8V In, PU
15 OUT UART2_CTS Debug UART2 CTS 1.8V In, PU
16 OUT GPS_UART1_RXD Debug GPS UART1 RXD 3.1V In, PU
17 IN GPS_UART1_TXD Debug GPS UART1 TXD 3.1V In, PU
18 n/a DNC18 Do not connect 1.8V In, HiZ
19 OUT GPS_UART2_RXD Do not connect 3.1V In, PU
20 IN GPS_UART2_TXD Do not connect 3.1V In, PD
Monarch Go-GPS board-to-board connector
reference: MOLEX 53916-0208
Debug UART2: Hardware flow control signals. Disabled by default.
Connect to headers.
Debug GPS_UART1. Data for GPS console . Connect to headers.
Debug UART2. Data for LTE modem console. Connect to headers.
Used internally, do not connect, keep floating.