IDT72V36106 Просмотр технического описания (PDF) - Integrated Device Technology
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IDT72V36106 Datasheet PDF : 39 Pages
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IDT72V3686/72V3696/72V36106 3.3V CMOS TRIPLE BUS SyncFIFOTM
WITH BUS-MATCHING 16,384 x 36 x 2, 32,768 x 36 x 2, 65, 536 x 36
COMMERCIAL TEMPERATURE RANGE
PIN DESCRIPTIONS (CONTINUED)
Symbol
Name
I/O
Description
FS0/SD FlagOffsetSelect0/ I FS1/SEN and FS0/SD are dual-purpose inputs used for flag Offset register programming. During Master Reset,
Serial Data
FS1/SEN and FS0/SD, together with FS2, select the flag offset programming method. Three Offset register
programming methods are available: automatically load one of five preset values (8, 16, 64, 256 or 1,024),
FS1/SEN FlagOffsetSelect1/ I parallel load from Port A, and serial load.
FS2(1)
Serial Enable
When serial load is selected for flag Offset register programming, FS1/SEN is used as an enable synchronous to
FlagOffsetSelect2 I the LOW-to-HIGH transition of CLKA. When FS1/SEN is LOW, a rising edge on CLKA load the bit present on
FS0/SD into the X and Y registers. The number of bit writes required to program the Offset registers is 56 for the
72V3686, 60 for the 72V3696, and 64 for the 72V36106. The first bit write stores the Y-register (Y1) MSB and
the last bit write stores the X-register (X2) LSB.
LOOP
Loopback Select
I This pin selects the loopback feature for Port A. During Loopback data from FIFO2 will be directed to the input of
FIFO1. to initiate a Loop the LOOP pin must be held LOW and the ENA pin must be HIGH.
MBA
Port A Mailbox I A HIGH level on MBA chooses a mailbox register for a Port A read or write operation. When the A0-A35
Select
outputs are active, a HIGH level on MBA selects data from the mail2 register for output and a LOW level selects
FIFO2 output-register data for output.
MBB
Port B Mailbox
I A HIGH level on MBB chooses a mailbox register for a Port B read operation. When the B0-B17 outputs are
Select
active, a HIGH level on MBB selects data from the mail1 register for output and a LOW level selects FIFO1 output
register data for output.
MBC
MBF1
MBF2
MRS1
MRS2
PRS1/
RT1
PRS2/
RT2
Port C Mailbox
Select
Mail1 Register
Flag
Mail2 Register
Flag
Master Reset
Master Reset
Partial Reset/
Retransmit FIFO1
Partial Reset/
Retransmit FIFO2
I A HIGH level on MBC chooses the mail2 register for a Port C write operation. This pin must be HIGH during
Master Reset.
O MBF1 is set LOW by a LOW-to-HIGH transition of CLKA that writes data to the mail1 register. Writes to the mail1
register are inhibited while MBF1 is LOW. MBF1 is set HIGH by a LOW-to-HIGH transition of CLKB when a
Port B read is selected and MBB is HIGH. MBF1 is set HIGH following either a Master or Partial Reset of FIFO1.
O MBF2 is set LOW by a LOW-to-HIGH transition of CLKC that writes data to the mail2 register. Writes to the mail2
register are inhibited while MBF2 is LOW. MBF2 is set HIGH by a LOW-to-HIGH transition of CLKA when a
Port A read is selected and MBA is HIGH. MBF2 is set HIGH following either a Master or Partial Reset of FIFO2.
I A LOW on this pin initializes the FIFO1 read and write pointers to the first location of memory and sets the Port B
output register to all zeroes. A LOW-to-HIGH transition on MRS1 selects the programming method (serial or
parallel) and one of five programmable flag default offsets for FIFO1 and FIFO2. It also configures ports B and
C for bus size and endian arrangement. Four LOW-to-HIGH transitions of CLKA and four LOW-to-HIGH
transitions of CLKB must occur while MRS1 is LOW.
I A LOW on this pin initializes the FIFO2 read and write pointers to the first location of memory and sets the Port A
output register to all zeroes. A LOW-to-HIGH transition on MRS2, toggled simultaneously with MRS1, selects
the programming method (serial or parallel) and one of the five flag default offsets for FIFO2. Four LOW-to-HIGH
transitions of CLKA and four LOW-to-HIGH transitions of CLKC must occur while MRS2 is LOW.
I This pin is muxed for both Partial Reset and Retransmit operations, it is used in conjunction with the RTM pin. If RTM
is in a LOW condition, a LOW on this pin performs a Partial Reset on FIFO1 and initializes the FIFO1 read and write
pointers to the first location of memory and sets the Port B output register to all zeroes. During Partial Reset, the currently
selected bus size, endian arrangement, programming method (serial or parallel), and programmable flag settings are
all retained. If RTM is HIGH, a LOW on this pin performs a Retransmit and initializes the FIFO1 read pointer only to
the first memory location.
I This pin is muxed for both Partial Reset and Retransmit operations, it is used in conjunction with the RTM pin. If RTM
is in a LOW condition, a LOW on this pin performs a Partial Reset on FIFO2 and initializes the FIFO2 read and write
selected bus size, endian arrangement, programming method (serial or parallel), and programmable flag settings are
all retained. If RTM is HIGH, a LOW on this pin performs a Retransmit and initializes the FIFO2 read pointer only to
the first memory location.
RENB
RTM
Port B Read Enable I RENB must be HIGH to enable a LOW-to-HIGH transition of CLKB to read data on Port B.
RetransmitMode I This pin is used in conjunction with the RT1 and RT2 pins. When RTM is HIGH a Retransmit is performed on FIFO1
or FIFO2 respectively.
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