DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 216

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

35. JTAG-BOUNDARY-SCAN ARCHITECTURE AND TEST-ACCESS PORT
The
SAMPLE/PRELOAD, BYPASS, and EXTEST. Optional public instructions included are HIGH-Z,
CLAMP, and IDCODE. The DS21455/DS21458 contain the following as required by IEEE 1149.1
Standard Test-Access Port and Boundary-Scan Architecture:
The Test Access Port has the necessary interface pins: JTRST, JTCLK, JTMS, JTDI, and JTDO. See the
pin descriptions for details.
Figure 35-1. JTAG Functional Block Diagram
Test Access Port (TAP)
TAP Controller
Instruction Register
Bypass Register
Boundary Scan Register
Device Identification Register
DS21455/DS21458
10k Ω
V
DD
JTDI
10k Ω
IEEE
V
DD
JTMS
TEST ACCESS PORT
BOUNDRY SCAN
IDENTIFICATION
1149.1
CONTROLLER
INSTRUCTION
REGISTER
REGISTER
REGISTER
REGISTER
BYPASS
JTCLK
design
10k Ω
216 of 270
V
DD
JTRST
supports
SELECT
OUTPUT ENABLE
MUX
the
standard
JTDO
instruction
codes