DS26303L-XXX DALLAS [Dallas Semiconductor], DS26303L-XXX Datasheet - Page 21
DS26303L-XXX
Manufacturer Part Number
DS26303L-XXX
Description
3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit
Manufacturer
DALLAS [Dallas Semiconductor]
Datasheet
1.DS26303L-XXX.pdf
(101 pages)
- Current page: 21 of 101
- Download datasheet (2Mb)
4.1.2 Serial Port Operation
Setting MODESEL = VDDIO/2 enables the serial bus interface on the DS26303. Port read/write timing is unrelated
to the system transmit and receive timing, allowing asynchronous reads or writes by the host. See Section
the AC timing of the serial port. All serial port accesses are LSB first. See
This port is compatible with the SPI interface defined for Motorola processors. An example of this is Motorola’s
MMC2107.
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 5 bits identify the register address (A1 to A5; A6 and A7 are 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 4-2. Serial Port Operation for Write Access
Figure 4-3. 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
0
(lsb)
1
A1
2
A1
2
A2
3
A2
3
A3
4
A3
4
A4
5
A4
5
A5
6
A5
6
A6
7
A6
7
(msb)
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
21 of 101
X
(msb)
8
X
8
DO
(lsb)
9
9
D0
(lsb)
10
D1
10
D1
D2
11
11
D2
Figure 4-2
D3
12
12
D3
D4
13
13
D4
to
D5
Figure
14
14
D5
D6
15
4-4.
15
D6
(msb)
D7
16
(msb)
16
D7
10.3
for
Related parts for DS26303L-XXX
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
TYPE DS FUSED DISCONNECT SWITCH 60A 3P
Manufacturer:
EATON CUTLER HAMMER
Part Number:
Description:
High Resolution Temperature Measurement with Dallas Direct-to-Digital Temperature Sensors
Manufacturer:
Dallas Semiconductor
Part Number:
Description:
32.768kHz Temperature-Compensated Crystal Oscillator
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
3.3 volt micromonitor, tolerance 20%
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
Ultra3 LVD/SE SCSI Terminator
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
SCSI Terminator
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
5-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
Afterburner Chip
Manufacturer:
Dallas Semiconductor
Datasheet:
Part Number:
Description:
10-Tap Silicon Delay Line
Manufacturer:
Dallas Semiconductor
Datasheet: