DS26334DK Maxim Integrated Products, DS26334DK Datasheet - Page 17
DS26334DK
Manufacturer Part Number
DS26334DK
Description
KIT DESIGN FOR DS26334
Manufacturer
Maxim Integrated Products
Specifications of DS26334DK
Main Purpose
Telecom, Line Interface Units (LIUs)
Utilized Ic / Part
DS26334
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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5 FUNCTIONAL DESCRIPTION
5.1 Port Operation
5.1.1 Serial Port Operation
Setting MODESEL = ‘low’ enables the serial bus interface on the DS26334. Port read/write timing is unrelated to
the system transmit and receive timing, allowing asynchronous reads or writes by the host. See Section
AC timing of the serial port. All serial port accesses are LSB first when BSWP pin is high and MSB first when
BSWP is low.
This port is compatible with the SPI interface defined for Motorola Processors. An example of this is the MMC2107
from Motorola.
Reading or writing to the internal registers requires writing one address/command byte prior to transferring register
data. The first bit written (LSB) of the address/command byte specifies whether the access is a read (1) or a write
(0). The next 6 bits identify the register address (A1 to A6) (A7 is ignored).
All data transfers are initiated by driving the CSB input low. When CLKE is low, SDO data is output on the rising
edge of SCLK and when CLKE is high, data is output on the falling edge of SCLK. Data is held until the next falling
or rising edge. All data transfers are terminated if CSB input transitions high. Port control logic is disabled and SDO
is tri-stated when CSB is high. SDI is always sampled on the rising edge of SCLK.
Figure 5-1. Serial Port Operation for Write Access
Figure 5-2. Serial Port Operation for Read Access with CLKE = 0
SCLK
CSB
SDI
SDI
CSB
SDO
SDO
(lsb)
SCLK
WRITE ACCESS ENABLED
0
1
Read
Access
Enabled
Figure 5-1
0
(lsb)
1
A1
2
A1
2
A2
3
to
A2
Figure 5-3
3
A3
4
A3
4
A4
5
A4
show operation with LSB first.
5
A5
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
6
A5
6
A
6
7
A6
7
(adrs
msb)
x
17 of 121
(msb)
8
X
8
DO
(lsb)
9
9
D0
(lsb)
10
D1
10
D1
D2
11
11
D2
D3
12
12
D3
D4
13
13
D4
D5
14
14
D5
D6
15
15
D6
(msb)
D7
16
(msb)
16
D7
9.3
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