OR3T125 Agere Systems, OR3T125 Datasheet - Page 90

• Manufacturer Part Number: OR3T125
• Description: 3C and 3T Field-Programmable Gate Arrays
• Manufacturer: Agere Systems

ORCA Series 3C and 3T FPGAs
Configuration Data Format
Table 32. Configuration Frame Format and Contents
* In MPI configuration mode, the number of stop bits = 32.
Note: For slave parallel mode, the byte containing the preamble must be 11110010. The number of leading header dummy bits must
90
(repeated for each
Configuration
Configuration
data frame)
Postamble
PREAMBLE LENGTH
ID Frame
be (n
integer. The number of stop bits/frame for slave parallel mode must be (x
stream generator tool supplies a bit stream that is compatible with all configuration modes, including slave parallel mode.
Address
0 0
Header
Frame
Frame
Data
1 0
*
CONFIGURATION HEADER
8) + 4, where n is any nonnegative integer and the number of trailing dummy bits must be (n
COUNT
PREAMBLE LENGTH
0 0
1 0
CONFIGURATION HEADER
Figure 52. Serial Configuration Data Format—Autoincrement Mode
ID FRAME
0101 1111 1111 1111
24-bit Length Count
Configuration Mode
COUNT
Alignment Bits = 0
1111111111111111
Figure 53. Serial Configuration Data Format—Explicit Mode
11111111 111111
Reserved [41:0]
14 Address Bits
Checksum
Checksum
Checksum
11110010
Data Bits
11111111
11111111
11111111
11111111
01
00
00
ID
ID FRAME
0 1
CONFIGURATION DATA
(continued)
CONFIGURATION
DATA FRAME 1
0 1
Preamble
Configuration frame length.
Trailing header—8 bits.
ID frame header.
00 = autoincrement, 01 = explicit.
Reserved bits set to 0.
20-bit part ID.
8-bit checksum.
Eight stop bits (high) to separate frames.
Data frame header.
Number of data bits depends upon device.
String of 0 bits added to bit stream to make frame header, plus data
bits reach a byte boundary.
8-bit checksum.
Eight stop bits (high) to separate frames.
Address frame header.
14-bit address of location to start data storage.
8-bit checksum.
Eight stop bits (high) to separate frames.
Postamble header.
Dummy address.
16 stop bits.*
CONFIGURATION DATA
CONFIGURATION
DATA FRAME 1
0 0
ADDRESS
FRAME 1
*
8), where x is a positive integer. Note also that the bit
0 1
0 1
CONFIGURATION DATA
CONFIGURATION DATA
CONFIGURATION
DATA FRAME 2
CONFIGURATION
DATA FRAME 2
*
8), where n is any positive
0 0
Lucent Technologies Inc.
0 0
POSTAMBLE
ADDRESS
FRAME 2
Data Sheet
June 1999
0 0
POSTAMBLE
5-5759(F)
5-5760(F)