MA28139
FEATURES s Radiation Hard s Low Power Consumption s Single CMOS-SOS ASIC Implementation s Latch-up Free s High SEU Immunity s Fully pliant with ESA OBDH, IUB, DBI and RBI Specification s Contains OBDH Bus Modem and RTU Kernel s Supports Bi-directional Data Transfer on Response and Block Transfer Bus
CONFIGURATION PINS
OBDH BUS I R BT I Rx R Rx
I (CTU) Tx R (RTU)
CLK DETECTOR, WATCHDOG
RTU KERNEL
INTERNAL USER BUS
BT Rx BT Rx
CONTROL LOGIC
DIGITAL BUS INTERFACE
CONTROL PINS
Figure 1: Block Diagram
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APPLICATION
CENTRAL TERMINAL Bus Controller
CT DBI
UP TO A TOTAL OF 62 TERMINALS
ODBH BUS
IUB DBU
RT DBI
DMUX
MPX RBI DMUX ADC RAM µP I/O RAM I/O µP RBI mands Timing Address
Digital Data Analogue Data
REMOTE TERMINAL
INTELLIGENT TERMINAL
Figure 2: Application
PAYLOAD INTERFACES
The OBT converts the OBDH bus to an Internal User Bus, and a Digital Bus Interface. The OBT can connect OBDH to existing ESA standard payload interfaces...
