DS26324 datasheet(14/120 Pages) MAXIM

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DS26324 3.3V, 16-Channel, E1/T1/J1 Short-Haul Line Interface Unit

14 of 120

NAME

TYPE

FUNCTION

SCLK/ALE/ASB

N14

Shift Clock. In the serial host mode, this pin is the serial clock. Data

on SDI is clocked on the rising edge of SCLK. The data is clocked on

SDO on the rising edge of SCLK if CLKE is high. If CLKE is low the

data on SDO is clocked on the falling edge of SCLK.

Address Latch Enable. In parallel Intel multiplexed mode, the

address lines are latched on the falling edge of ALE.

Address Strobe Bar. In parallel Motorola multiplexed mode, the

address is sampled on the falling edge of ASB.

Note: Tie ALE/ASB pin high if using nonmuxed mode.

RDB/RWB

H14

Read Bar. In Intel host mode, this pin must be low for read operation.

Read Write Bar. In Motorola mode, this pin is low for write operation

and high for read operation.

SDI/WRB/DSB

G14

Serial Data Input. In the serial host mode, this pin is the serial input

SDI; it is sampled on the rising edge of SCLK.

Write Bar. In Intel host mode, this pin is active low during write

operation. The data or address (multiplexed mode) is sampled on the

rising edge of WRB.

Data Strobe Bar. In the parallel Motorola mode, this pin is active low.

During a write operation the data or address is sampled on the rising

edge of DSB. During a read operation the data or address is driven

on the rising edge of DSB. In the nonmultiplexed Motorola mode the

address bus (A[5:0]) is latched on the falling edge of DSB.

SD0/RDYB/ACKB

C13

Serial Data Out. In serial host mode, the SDO data is output on this

pin. If a serial write is in progress this pin is high impedance. During a

read SDO is high impedance when the SDI is in command/address

mode. If CLKE is low SDO is output on the rising edge of SCLK, if

CLKE is high on the falling edge.

Ready Bar Output. A high on this pin reports to the host that the

cycle is not complete and wait states must be inserted. A low means

the cycle is complete.

Acknowledge Bar. In Motorola parallel mode, a low on this pin

indicates that the read data is available for the Host or that the written

data cycle is complete.

INTB

open

drain

Interrupt Bar (Active Low). This signal is tri-state when RSTB pin is

low. 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 as open drain. The reset

default is open drain when there are no active enabled interrupt

sources. All interrupt sources are disabled when RSTB = 0 and they

must be programmed to be enabled.

DS26324 Datasheet(PDF) 14 Page - Maxim Integrated Products

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