DS3174+ Maxim Integrated Products, DS3174+ Datasheet - Page 33
DS3174+
Manufacturer Part Number
DS3174+
Description
IC TXRX DS3/E3 QUAD 400-BGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3171N.pdf
(234 pages)
Specifications of DS3174+
Function
Single-Chip Transceiver
Interface
DS3, E3
Number Of Circuits
4
Voltage - Supply
3.135 V ~ 3.465 V
Current - Supply
725mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
400-BGA
Includes
DS3 Framers, E3 Framers, HDLC Controller, On-Chip BERTs
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
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PIN NAME
BSWAP
D[15:0]
WIDTH
A[10:1]
MODE
A[0] /
WR /
RD /
RDY
ALE
R/W
INT
CS
DS
TYPE
Oz
Oz
IO
I
I
I
I
I
I
I
Bi-directional 16 or 8-bit data bus
This bus is tri-state when RST pin is low or CS pin is high.
D[15:0]: A 16-bit or 8-bit data bus used to input data during register writes, and data outputs
during register reads. The upper 8 bits are not used and never driven in 8-bit bus mode.
Weak pull up resistors or bus holders should be used for each pin.
Address bus (minus LSB)
A[10:1]: identifies the specific 16 bit registers, or group of 8 bit registers, being accessed. A[10]
must be tied to ground for the DS3181 and DS3182 versions.
Address bus LSB / Byte Swap
A[0]: This signal is connected to the lower address bit in 8-bit systems. (WIDTH=0)
BSWAP: This signal is tied high or low in 16-bit systems.
(WIDTH=1)
Address Latch Enable
ALE: This signal is used to latch the address on the A[10:0] pins in multiplexed address
systems. When it is high the address is fed through the address latch to the internal logic.
When it transitions to low, the address is latched and held internally until the signal goes back
high. ALE should be tied high for non-multiplexed address systems.
Chip Select (active low)
CS: This signal must be low during all accesses to the registers
Read Strobe (active low) / Data Strobe (active low)
RD: Read Strobe mode (MODE=0):
DS: Data Strobe mode (MODE=1):
Write Strobe (active low) / R/W Select
WR: Write Strobe mode (MODE=0):
R/W: Data Strobe mode (MODE=1):
Ready handshake (active low)
RDY: This ready signal is driven low when the current read or write cycle is in progress. When
the current read or write cycle is not ready it is driven high. When device is not selected, it is not
driven.
Interrupt (active low)
This signal is tri-state when RST pin is low.
INT: This interrupt signal is driven low when an event is detected on any of the enabled
interrupt sources in any of the register banks. When there are no active and enabled interrupt
sources, the pin can be programmed to either drive high or not drive high. The reset default is
to not drive high when there is no active and enabled interrupt source. All interrupt sources are
disabled when RST=0 and they must be programmed to be enabled.
Mode select RD/WR or DS strobe mode
MODE: 1 = Data Strobe Mode, 0 = Read/Write Strobe Mode
Data bus width select 8 or 16-bit interface
WIDTH: 1 = 16-bits, 0 = 8 bits
1 = Output register bits 15:8 on D[7:0], D[15:8] not driven
0 = Output register bits 7:0 on D[7:0], D[15:8] not driven
1 = Output register bits 15:8 on D[7:0], 7:0 on D[15:8]
0 = Output register bits 7:0 on D[7:0], 15:8 on D[15:8]
RD is low during a register read.
DS is low during either a register read or a write.
WR is low during a register write.
R/W is high during a register read cycle, and low during a register write cycle.
MICROPROCESSOR INTERFACE
33
PIN DESCRIPTION
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