hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 18

• Manufacturer Part Number: hi-6131pqtf
• Description: Mil-std-1553 / Mil-std-1760 3.3v Bc / Mt / Rt Multi-terminal Device
• Manufacturer: QuickLogic Corp

Pin
BENDI
RAMEDC
TEST
MODE
VCC
VCCP
GND
BUSA
BUSA
BUSB
BUSB
Function
Input
50KΩ pull-up
Input
50KΩ pull-down
Input
50KΩ pull-down
Input
50KΩ pull-up
Power Supply
Analog
Analog
Description
Big Endian configuration pin for selecting “endianness” or byte order, when
using byte transfers. Endianness is the system attribute that indicates whether
integers are represented with the most significant byte stored at the lowest
address (big endian) or at the highest address (little endian). Internal register /
RAM storage is “big endian.”
When using the HI-6130, this pin only applies when the host parallel bus is
configured for 8-bit width, that is, when BWID equals 0. When the HI-6130 is
configured for 16-bit bus width, the BENDI input pin is “don’t care.”
When using the HI-6131, this pin controls the byte order of transferred 16-bit
data following the SPI command. When BENDI is low, “little endian” is chosen;
the low order byte (bits 7:0) is transacted on the SPI before the high order byte
(bits 15:8). When BENDI is high, “big endian” is chosen and the high order byte
is transacted on the SPI before the low order byte.
RAM EDC (Error Detection / Correction) enable.
When pin is low, device operates with 32K word RAM address space, EDC
disabled. When pin is high, device operates with 24K word RAM address space
with EDC enabled. All single-bit RAM read errors are automatically corrected.
The corrected errors and uncorrectable multi-bit RAM read errors can generate
separate, optional interrupts.
Test enable input. The host asserts this pin to perform RAM self-test and loop-
back tests.
Pin used for factory test. Do not connect.
3.3VDC power supply for logic and bus transceiver.
Bi-directional Bus A interface to external MIL-STD-1553 isolation transformer.
Observe positive / negative polarity.
Bi-directional Bus B interface to external MIL-STD-1553 isolation transformer.
Observe positive / negative polarity.
HOLT INTEGRATED CIRCUITS
HI-6130, HI-6131
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