DS123 XILINX [Xilinx, Inc], DS123 Datasheet - Page 6

• Manufacturer Part Number: DS123
• Description: Platform Flash In-System Programmable Configuration PROMs
• Manufacturer: XILINX [Xilinx, Inc]

Table 6: XCFxxS Instruction Capture Values Loaded into IR as part of an Instruction Scan Sequence
Table 7: XCFxxP Instruction Capture Values Loaded into IR as part of an Instruction Scan Sequence
Boundary-Scan Register
The Boundary-Scan register is used to control and observe
the state of the device pins during the EXTEST,
SAMPLE/PRELOAD, and CLAMP instructions. Each output
pin on the Platform Flash PROM has two register stages which
contribute to the Boundary-Scan register, while each input pin
has only one register stage. The bidirectional pins have a total
of three register stages which contribute to the Boundary-Scan
register. For each output pin, the register stage nearest to TDI
controls and observes the output state, and the second stage
closest to TDO controls and observes the High-Z enable state
of the output pin. For each input pin, a single register stage
controls and observes the input state of the pin. The
bidirectional pin combines the three bits, the input stage bit is
first, followed by the output stage bit and finally the output
enable stage bit. The output enable stage bit is closest to TDO.
See
Boundary-Scan bit order for all connected device pins, or see
the appropriate BSDL file for the complete Boundary-Scan bit
order description under the “attribute
BOUNDARY_REGISTER” section in the BSDL file. The bit
assigned to Boundary-Scan cell 0 is the LSB in the Boundary-
Scan register, and is the register bit closest to TDO.
Identification Registers
IDCODE Register
The IDCODE is a fixed, vendor-assigned value that is used to
electrically identify the manufacturer and type of the device
being addressed. The IDCODE register is 32 bits wide. The
IDCODE register can be shifted out for examination by using
the IDCODE instruction. The IDCODE is available to any
other system component via JTAG.
register values for the Platform Flash PROMs.
The IDCODE register has the following binary format:
where
DS123 (v2.18) May 19, 2010
Product Specification
TDI →
TDI →
vvvv:ffff:ffff:aaaa:aaaa:cccc:cccc:ccc1
v = the die version number
f = the PROM family code
a = the specific Platform Flash PROM product ID
c = the Xilinx manufacturer's ID
Table 12, page 24
R
Reserved
IR[15:9]
Reserved
IR[7:5]
and
Table 13, page 26
ISC Error
IR[8:7]
Table 8
ISC Status
IR[4]
lists the IDCODE
ER/PROG
for the
IR[6:5]
Error
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Platform Flash In-System Programmable Configuration PROMs
ER/PROG
Security
Status
IR[4]
IR[3]
The LSB of the IDCODE register is always read as logic 1
as defined by IEEE Std. 1149.1.
Table 8: IDCODES Assigned to Platform Flash PROMs
USERCODE Register
The USERCODE instruction gives access to a 32-bit user
programmable scratch pad typically used to supply
information about the device's programmed contents. By
using the USERCODE instruction, a user-programmable
identification code can be shifted out for examination. This
code is loaded into the USERCODE register during
programming of the Platform Flash PROM. If the device is
blank or was not loaded during programming, the
USERCODE register contains FFFFFFFFh.
Customer Code Register
For the XCFxxP Platform Flash PROM, in addition to the
USERCODE, a unique 32-byte Customer Code can be
assigned to each design revision enabled for the PROM.
The Customer Code is set during programming, and is
typically used to supply information about the design
revision contents. A private JTAG instruction is required to
read the Customer Code. If the PROM is blank, or the
Customer Code for the selected design revision was not
loaded during programming, or if the particular design
revision is erased, the Customer Code contains all ones.
Notes:
1.
The <v> in the IDCODE field represents the device’s revision
code (in hex) and can vary.
ISC Status
IR[3]
XCF01S
XCF02S
XCF04S
XCF08P
XCF16P
XCF32P
Device
IR[2]
0
DONE
IR[2]
IR[1:0]
0 1
IR[1:0]
0 1
IDCODE
<v>5044093
<v>5045093
<v>5046093
<v>5057093
<v>5058093
<v>5059093
(1)
(hex)
→ TDO
→ TDO
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