3
AT40K Series Configuration
1009B–FPGA–03/02
Table 2.
Configuration Pins Interface Definition
Pins
State
Reset
Download
Mode 0
Download
Mode 1
Download
Mode 7
Download
Mode 2
Download
Mode 6
Download
Mode 4
Idle
M
(2:0)
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
RESET
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
TTL Input,
50K Pull-up
INIT
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
Open Drain
Bi-directional,
20K Pull-up
User I/O
CON
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
Open Drain
Bi-directional,
10K Pull-up
CCLK
Schmitt
Trigger Input,
50K Pull-up
Output
Schmitt
Trigger Input,
50K Pull-up
Schmitt
Trigger Input,
50K Pull-up
Schmitt
Trigger Input,
50K Pull-up
Schmitt
Trigger Input,
50K Pull-up
Schmitt
Trigger Input,
50K Pull-up
Schmitt
Trigger Input,
50K Pull-up
HDC
Output
Output
Output
Output
Output
Output
User I/O
User I/O
LDC
Output
Output
Output
Output
Output
Output
User I/O
User I/O
D
0
CMOS
Input, 20K
Pull-up
Input
Input
Input
Input
Input
Bi-directional
User I/O
D
(7:1)
CMOS
Input, 20K
Pull-up
User I/O
User I/O
User I/O
Input
Input
Bi-directional
User I/O
D
(15:8)
CMOS
Input, 20K
Pull-up
User I/O
User I/O
User I/O
Optional Input
Optional Input
Optional
Bi-directional
User I/O
A
(19:0)
CMOS
Input, 20K
Pull-up
User I/O
User I/O
User I/O
User I/O
Output
Input
User I/O
A
(23:20)
CMOS
Input, 20K
Pull-up
User I/O
User I/O
User I/O
User I/O
User I/O
Input
User I/O
CS0
CMOS
Input, 20K
Pull-up
User I/O
Input
User I/O
User I/O
User I/O
Input
User I/O
CS1
CMOS
Input, 20K
Pull-up
User I/O
User I/O
User I/O
Input
User I/O
User I/O
User I/O
CSOUT
CMOS
Input, 20K
Pull-up
Optional Output
Optional
Output
Optional
Output
Optional
Output
Optional
Output
User I/O
User I/O
CHECK
CMOS
Input, 20K
Pull-up
Check Input
or User I/O
Check Input
or User I/O
Check Input
or User I/O
Check Input
or User I/O
Check Input
or User I/O
Check Input
or User I/O
User I/O
OTS
CMOS
Input, 20K
Pull-up
OTS Input
or User I/O
OTS Input
or User I/O
OTS Input
or User I/O
OTS Input
or User I/O
OTS Input
or User I/O
OTS Input
or User I/O
OTS Input
or User I/O
