DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 198

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

30.
30.1 Description
The DS2Q155 IEEE 1149.1 design supports the standard instruction codes SAMPLE/PRELOAD,
BYPASS, and EXTEST. Optional public instructions included are HIGHZ, CLAMP, and IDCODE
(Figure
access port (TAP) and boundary scan architecture.
§ Test Access Port
§ TAP Controller
§ Instruction Register
§ Bypass Register
§ Boundary Scan Register
§ Device Identification Register
The TAP contains the necessary interface pins JTRST, JTCLK, JTMS, JTDI, and JTDO. See the pin
descriptions in Section
Figure 30-1. JTAG Functional Block Diagram
JTAG BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT
30-1.). The DS21Q55 contains the following features as required by IEEE 1149.1 standard test
2
10kΩ
for details.
+V
JTDI
10kΩ
+V
JTMS
TEST ACCESS PORT
BOUNDARY SCAN
IDENTIFICATION
CONTROLLER
INSTRUCTION
REGISTER
REGISTER
REGISTER
REGISTER
BYPASS
JTCLK
198 of 237
10kΩ
+V
JTRST
SELECT
OUTPUT ENABLE
MUX
JTDO