Data Sheet
June 1999
ORCA Series 3C and 3T FPGAs
Configuration Data Format (continued)
CONFIGURATION DATA
CONFIGURATION DATA
0
0 1 0
0 1
0 1
0 0
PREAMBLE LENGTH
COUNT
ID FRAME
CONFIGURATION
DATA FRAME 1
CONFIGURATION
DATA FRAME 2
POSTAMBLE
CONFIGURATION HEADER
5-5759(F)
Figure 52. Serial Configuration Data Format—Autoincrement Mode
CONFIGURATION DATA
CONFIGURATION DATA
0
0
1
0
0
1
0 0
0 1
0 0
0 0
LENGTH
COUNT
PREAMBLE
CONFIGURATION
DATA FRAME 1
ADDRESS
FRAME 1
CONFIGURATION
DATA FRAME 2
ADDRESS
FRAME 2
ID FRAME
POSTAMBLE
CONFIGURATION HEADER
5-5760(F)
Figure 53. Serial Configuration Data Format—Explicit Mode
Table 32.
Configuration Frame Format and Contents
11110010 Preamble
Header
24-bit Length Count
11111111
Configuration frame length.
Trailing header—8 bits.
ID frame header.
0101 1111 1111 1111
Configuration Mode
Reserved [41:0]
ID
00 = autoincrement, 01 = explicit.
Reserved bits set to 0.
ID Frame
20-bit part ID.
Checksum
8-bit checksum.
11111111
Eight stop bits (high) to separate frames.
Data frame header.
01
Configuration
Data
Frame
(repeated for each
data frame)
Data Bits
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.
Alignment Bits = 0
Checksum
11111111
8-bit checksum.
Eight stop bits (high) to separate frames.
Address frame header.
00
Configuration
Address
14 Address Bits
Checksum
11111111
14-bit address of location to start data storage.
8-bit checksum.
Frame
Eight stop bits (high) to separate frames.
Postamble header.
00
Postamble
11111111 111111
1111111111111111
Dummy address.
16 stop bits.*
* 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.
90
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
