Ublox LEA-M8F, Hardware Integration Manual

Page: 19 / 30

LEA-M8F - Hardware Integration Manual
UBX-14000034 - R03 Early Production
Information
Migration
to u-blox M8 modules
Page 19 of 30
Pin
No. LEA-6T LEA-M8F Remarks for Migration
Pin Name Typical Assignment Pin Name Typical Assignment
1 SDA2 DDC Pins
SDA2/CS_N
DDC data or SPI chip
select
Depends on D_SEL (pin 5) status
2
SCL2
DDC Pins SCL2/SCLK
DDC clock or SPI clock
Depends on D_SEL (pin 5) status
3
TxD1 Serial Port 1 TxD1/MISO
UART TX or SPI MISO Depends on D_SEL (pin 5) status
4 RxD1
Serial Port 1
RxD1/MOSI
UART RX or SPI MOSI
Depends on D_SEL (pin 5) status
5 NC Leave open DSEL
Interface type
selection
Used to select UART+DDC or SPI only
Open = UART+DDC; GND = SPI on pins
1,2,3,4
6 VCC
Supply Voltage
VCC Supply Voltage No difference
7 GND Ground GND Ground No difference
8
VCC_OUT Leave open if not
used. VCC_OUT Leave open if not used.
No difference
9 Timepulse TimePulse2 o/p REF_FREQ_OUT VCTCXO o/p Module VCTCXO signal o/p
10
RESET_N
Hardware Reset
(Active Low)
RESET_N
Hardware Reset (Active
Low)
11
V_BCKP Backup voltage
supply
V_BCKP Backup voltage
supply
Back-up operation not supported -
Connect to Vcc
12
SAFEBOOT_
N
GND Reserved Leave Open Test-point for service access
13 GND GND GND GND No difference
14 GND GND GND GND No difference
15 GND GND GND GND No difference
16 RF_IN RF input RF_IN RF input No difference
17 GND GND GND GND No Difference
18 VCC_RF
O/P Voltage for RF
section
VCC_RF
O/P Voltage for RF
section
No difference
19 V_ANT Ant. Bias V V_ANT Ant. Bias V No difference
20 AADET_N
Active Antenna
Detect
Reserved
Leave Unconnected
No Antenna Supervision
21 NC
No Connection FREQ_PHASE_I
N1/ EXTINT1
2 nd Freq/ PPS input
22 NC
No Connection
SDA_DAC
DDC pin for Ext DAC
o/p
.
23 NC
No Connection
SCL_DAC
DDC pin for Ext DAC
o/p
24 VDD USB
USB Voltage
Source
VDD USB USB Voltage Source Not supported for operational use
25 USB_DM USB I/O Line - USB I/O Line USB I/O Line - Not supported for operational use
26 USB_DP USB I/O Line + USB I/O Line USB I/O Line + Not supported for operational use
27 EXTINT0 Ext. Interupt
FREQ_PHASE_IN
0/
EXTINT0
1 st Freq/ PPS input
28 Timepulse Timepulse signal
Timepulse/TP2/
SAFEBOOT_N Timepulse signal
SAFEBOOT_N Timepulse is TP2
Must float during reset (see 1.6.5)
Table 4: Pin-out comparison LEA-6T vs. LEA-M8F