M88 Evaluation Kit User Guide
Additional connectors
STO-DEV7227-HB Rev. 2.1
15
9.1.8
GNSS Add-on Board System Connector
Pin
Signal
Pin
Signal
1
GND
2
GND
3
VBAT
4
3.3V
5
Reserved. NC
6
PF6 Pull-up
7
Reserved. NC
8
UTX1
9
Reserved. NC
10
URX1. Jumper P505 decides if RX for COM1 is taken
from here or from the COM1 connector P503.
11
Reserved. NC
12
1PPS
13
Reserved. NC
14
3D sync. Have LED connected to PF7 for control.
15
NC
16
3.3V
Table 11. GNSS Add-on Board System Connector pin description
9.1.9
Oscillator Add-on Board System Connector
Pin
Signal
Pin
Signal
1
GND
2
3.3V
3
EXT_OSCCLK 4
3.3V
5
GND
6
GND
7
EXTREF
8
ACH0
9
GND
10
GND
11
AOUT0
12
ACH1
13
GND
14
GND
15
VREG_IN
16
VREG_IN
Table 12. Oscillator Add-on Board System Connector pin description
