VM800C Datasheet
Version 1.0
Document Reference No.: FT_000844
Clearance No.: FTDI#
345
J4 – SP-
Audio speaker -ve from the onboard amplifier.
J5- SPI Interface
This is the interface where the SPI control and data signals are routed. There are also power and
ground pins on this interface. Note J5 is not soldered on the VM800C board by default.
Pin No.
1
2
3
4
5
6
7
8
9
10
Table 3-6 – J5 Pinout
Name
SCLK
MOSI
MISO
CS#
INT#
PD#
5V
3.3V
GND
GND
Type
I
I
O
I
OD
I
P
P
P
P
SPI Clock input
Description
Master Out Slave in
Master In Slave out
Chip select , active low
Host interrupt open drain output, active low.
On board 47k
Ω pull-up to 3.3V.
Active low power down input.
5V power supply
3.3V power supply
Ground
Ground
JP1- Audio Amplifier Power Select
This jumper provides the option to select the power supply voltage for the onboard power amplifier.
Pin No.
1-2
Name
3V3 selected
2-3
5V selected
Table 3-7 – JP1 Pin options
*This needs to be configured before audio can be heard
JP2 – On board amplifier enable
Solder connection fitted by default
JP3 - On board amplifier mute
Solder connection not fited by default
SW1 – Power source select
Pin No.
1-2
Name
Power from CN1
2-3
Power from CN2
Table 3-8 – JP1 Pin options
9
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