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3. Hardware Installations
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SPI-8451-LLVA, SPI-8452-LLVA, SPI-8451-LVA
USB Connector: CN18, CN19, CN20
This product have three USB (v2.0 compliant) pin-header connector (USB0/1: CN18, USB2/3: CN19,
USB4/5: CN20).
Table 3.19. USB Pin-header Connector (CN18, CN19, CN20)
Pin No.
2
4
6
8
10
Function
VCC1
USBP1-
USBP1+
USBG
GND
Pin No.
1
3
5
7
9
Function
VCC0
USBP0-
USBP0+
USBG
N.C.
CN18/19/20
19
210
* Pin 9 is reverse-of the connector and empty pin of prevention.
* Optional USB Cable: USB Connector Cable
CAUTION
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Classrequirements, even if no device or a low-speed USB device is attached to the cable. Use
shielded cable that meets the requirements for full-speed devices.
External Battery Connector: CN21
(SPI-8451-LVA only)
It is a 2 Pin connector used for external battery. An external battery power for used of Real-time clock
and CMOS memory.
Table 3.20. External Battery Connector
Pin No.
1
2
Function
GND
External battery
(3V)
CN21
Housing: IL-2S-S3L-(N) (JAE)
Contact: IL-C2-1-10000 (JAE)
2
1
SPI-8451-LLVAS / SPI-8452-LLVAS has the large capacity battery connected to this connector as standard.