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CubeSat Kit PSPM B Rev. B

March 2010 – document Rev. A

PPM PIN DESCRIPTIONS

The PPM connector H1 connects the PSPM to resources residing on the DB and to resources accessible

via the CubeSat Kit Bus connector.

Those signals that are connected directly to the PPM connector and to the CubeSat Kit Bus connectors

are tagged under the CSKB label below.

Signals marked with an ‘*’ are associated with dedicated

peripherals on the DB. They may also be used with off-board peripherals through the proper use of DB

peripheral enables and DB power control.

The potential for a pin’s function is described by the I/O field. The recommended usage (as a digital or

analog input or output, or as a power pin) is listed in the Description field. I/O pins can generally be

configured as general-purpose I/O if the recommended usage is not desired.

Inputs are signals from the DB to the PSPM’s processor U1 or other circuitry. Outputs are signals from the

PSPM’s processor U1 or other circuitry to the DB.

100

LSS-150-01-L-DV

IO.36

IO.37

IO.38

IO.39

IO.40

IO.41

IO.42

IO.43

IO.44

IO.45

IO.46

IO.47

IO.12

IO.13

IO.14

IO.15

IO.16

IO.17

IO.18

IO.19

IO.20

IO.21

IO.22

IO.23

IO.0

IO.1

IO.2

IO.3

IO.4

IO.5

IO.6

IO.7

IO.8

IO.9

IO.10

IO.11

* IO.24

IO.25

IO.26

IO.27

IO.28

IO.29

IO.30

IO.31

IO.32

IO.33

IO.34

IO.35

+5V_USB

+5V_SYS

VCC_SD

VCC

DGND

AGND

VBATT

VBACKUP

-FAULT_OC

SENSE

-RESET -->

<--

<--*

+5V_USB

+5V_SYS

VCC_SD

VCC

DGND

AGND

VBATT

VBACKUP

VREF0

VREF1

VREF2

-ON_SD

-ON_MHX

-OE_MHX

HS0

HS1

HS2

<--

-->

<--

-OE_USB/-INT

SDA_SYS

SCL_SYS

OFF_VCC

<--

<->

-->

HS3

HS4

HS5

-->

Not included. MBs are purchased separately from PSPMs.

The CubeSat Kit’s system peripherals are numbered from 0 onwards (e.g., UART0, SPI0, etc.), and this nomenclature is used

when referring to a PPM or CSK bus signal. The C8051’s peripheral nomenclature begins with 0 (e.g., UART0, SMB0, etc.), and is

used when referring to peripherals, signals and registers internal to the C8051.

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