IEEE Std. 1149.1 (JTAG) Boundary Scan Support
The Cyclone II device instruction register length is 10 bits and the
USERCODEregister length is 32 bits. Tables 3–2 and 3–3 show the
boundary-scan register length and device IDCODEinformation for
Cyclone II devices.
Table 3–2. Cyclone II Boundary-Scan Register Length
Device
Boundary-Scan Register Length
EP2C5
EP2C8
498
597
EP2C15
EP2C20
EP2C35
EP2C50
EP2C70
969
969
1,449
1,374
1,890
Table 3–3. 32-Bit Cyclone II Device IDCODE
IDCODE (32 Bits) (1)
Device
Version (4 Bits)
0000
Part Number (16 Bits)
0010 0000 1011 0001
0010 0000 1011 0010
0010 0000 1011 0011
0010 0000 1011 0011
0010 0000 1011 0100
0010 0000 1011 0101
0010 0000 1011 0110
Manufacturer Identity (11 Bits) LSB (1 Bit) (2)
EP2C5
EP2C8
000 0110 1110
000 0110 1110
000 0110 1110
000 0110 1110
000 0110 1110
000 0110 1110
000 0110 1110
1
1
1
1
1
1
1
0000
EP2C15
EP2C20
EP2C35
EP2C50
EP2C70
0000
0000
0000
0000
0000
Notes to Table 3–3:
(1) The most significant bit (MSB) is on the left.
(2) The IDCODE’s least significant bit (LSB) is always 1.
For more information on the Cyclone II JTAG specifications, refer to the
DC Characteristics & Timing Specifications chapter in the Cyclone II Device
Handbook, Volume 1.
3–4
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2007
ALTERA [ ALTERA CORPORATION ]
