
90
Lucent Technologies Inc.
Data Sheet
June 1999
ORCA Series 3C and 3T FPGAs
Configuration Data Format
(continued)
5-5759(F)
Figure 52. Serial Configuration Data Format—Autoincrement Mode
5-5760(F)
Figure 53. Serial Configuration Data Format—Explicit Mode
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
be (n
*
8) + 4, where n is any nonnegative integer and the number of trailing dummy bits must be (n
*
8), where n is any positive
integer. The number of stop bits/frame for slave parallel mode must be (x
*
8), where x is a positive integer. Note also that the bit
stream generator tool supplies a bit stream that is compatible with all configuration modes, including slave parallel mode.
Header
11110010
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.*
24-bit Length Count
11111111
0101 1111 1111 1111
Configuration Mode
Reserved [41:0]
ID
Checksum
11111111
01
Data Bits
ID Frame
Configuration
Data
Frame
(repeated for each
data frame)
Alignment Bits = 0
Checksum
11111111
00
14 Address Bits
Checksum
11111111
00
11111111 111111
1111111111111111
Configuration
Address
Frame
Postamble
CONFIGURATION DATA
CONFIGURATION DATA
1 0
0 1
0 1
PREAMBLE LENGTH
ID FRAME
CONFIGURATION
DATA FRAME 1
CONFIGURATION
DATA FRAME 2
POSTAMBLE
CONFIGURATION HEADER
0 0
0 0
COUNT
PREAMBLECOUNT
ID FRAME
CONFIGURATION
DATA FRAME 1
CONFIGURATION
DATA FRAME 2
POSTAMBLE
CONFIGURATION HEADER
ADDRESS
FRAME 1
ADDRESS
FRAME 2
0 0
CONFIGURATION DATA
CONFIGURATION DATA
1 0
0 1
0 1
0 0
0 0
0 0