m21353 Mindspeed Technologies, m21353 Datasheet - Page 29

• Manufacturer Part Number: m21353
• Description: 4.25 Gbps Twelve-channel Backplane Equalizer And Driver With 12x12 Crosspoint Switch
• Manufacturer: Mindspeed Technologies

5.10
There are two control modes available for the M21353. To control using a two wire, I
interface, the device can be configured for Software Interface Control (SIC). The M21353 can also self configure
from an external EEPROM when the Memory Interface Control (MIC) mode is selected. In addition to the two
control modes, the M21353 also supports boundary scan through a JTAG port. The boundary scan mode is
enabled by setting the ADDR2 and ADDR1 pins to the logic floating level.
To configure the device for Boundary Scan or Memory Interface Control Mode, configure the ADDR2, ADDR1, and
ADDR0 pins as shown:
Table 5-1.
5.11
In order to test external connections to and from the M21353, the device includes support for boundary scan
through a JTAG port when configured for boundary scan mode. Boundary scan is supported on control pins and
high-speed input pins. Boundary scan is not supported on high-speed output pins.
When the M21353 is in boundary scan test mode, the following pins are used for JTAG signals:
Table 5-2.
5.12
The functionality of the M21353 is controlled through register settings. Refer to Sections
description of the registers available within the M21353. To access the registers, an I
programming interface is available in the device. The two-wire device address is determined by the status of the
pins ADDR [2:0]. The table below shows the address for each combination of settings for ADDR [2:0].
Table 5-3.
21353-DSH-001-B
Memory Interface Control (EEPROM)
Boundary Scan
ADDR2
H or L
H or L
Pin Name
F
ADDR0
xSEL
Operating Mode
SDA
SCL
Control Mode
Boundary Scan Mode Functionality
Two Wire Serial Device Address (1 of 2)
Control Options
Boundary Scan Operation
Software Interface Control Mode Operation
ADDR1
x
F
F
Pin Number
24
22
88
21
Mindspeed Technologies
ADDR0
H
L
ADDR2
x
X
F
Boundary Scan Mode
Functionality in
TCLK
TMS
TDO
TDI
M21353 Device Address
®
ADDR1
0100000
0100000
None
F
F
2
2
C compatible programming
C compatible, two-wire
Functional Description
4.1
and
4.2
ADDR0
for a full
H
X
MIC mode
SIC mode
Reserved
Mode
29