ep1m120 Altera Corporation, ep1m120 Datasheet - Page 65

• Manufacturer Part Number: ep1m120
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Altera Corporation
Notes to
(1)
(2)
SAMPLE/PRELOAD Allows a snapshot of signals at the device pins to be captured and examined during
EXTEST
BYPASS
USERCODE
IDCODE
ICR Instructions
SignalTap
Instructions
EP1M120
EP1M350
Table 16. Mercury JTAG Instructions
Table 18. 32-Bit Mercury Device IDCODE
JTAG Instruction
Device
The most significant bit (MSB) is on the left.
The IDCODE’s least significant bit (LSB) is always 1.
Table
18:
Version
(4 Bits)
0000
0000
normal device operation and permits an initial data pattern to be output at the device pins.
Also used by the SignalTap embedded logic analyzer.
Allows the external circuitry and board-level interconnections to be tested by forcing a test
pattern at the output pins and capturing test results at the input pins.
Places the 1-bit bypass register between the TDI and TDO pins, which allows the BST data
to pass synchronously through selected devices to adjacent devices during normal device
operation.
Selects the 32-bit USERCODE register and places it between the TDI and TDO pins,
allowing the USERCODE to be serially shifted out of TDO.
Selects the IDCODE register and places it between TDI and TDO, allowing the IDCODE
to be serially shifted out of TDO.
These instructions are used when configuring a Mercury device via the JTAG port with a
ByteBlasterMV
embedded processor.
These instructions monitor internal device operation with the SignalTap embedded logic
analyzer.
The Mercury device instruction register length is 10 bits. The Mercury
device USERCODE register length is 32 bits.
boundary-scan register length and device IDCODE information for
Mercury devices.
Table 17. Mercury Boundary-Scan Register Length
0011 0000 0000 0000
0011 0000 0000 0001
Part Number (16 Bits)
TM
download cable, or using a Jam STAPL or Jam Byte-Code file via an
Device
EP1M120
EP1M350
Mercury Programmable Logic Device Family Data Sheet
IDCODE (32 Bits)
Description
Boundary-Scan Register Length (Bits)
Manufacturer Identity
000 0110 1110
000 0110 1110
(1)
(11 Bits)
Tables 17
1,125
1,695
and
18
1 (1 Bit)
show the
1
1
(2)
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