Altera Dynamic Calibrated On-Chip Termination - Manual (Page 16)

Chapter 3: Functional Description 3–9
ALTOCT Megafunction Ports
February 2012 Altera Corporation Dynamic Calibrated On-Chip Termination (ALTOCT) Megafunction
User Guide
Output Ports
rup Yes Pull-up reference resistor Input port [OCT_BLOCK_NUMBER - 1..0] wide
s2pload Yes
Signal used to enable serial
to parallel shifting of
calibrated codes to I/O
buffers
Input port [OCT_BLOCK_NUMBER - 1..0] wide
clken No Clock enable If omitted, value is V
CC
Table 3–2. ALTOCT Megafunction Input Ports
Port Name Required Description Comments
Table 3–3. ALTOCT Megafunction Output Ports
Port Name Required Description Comments
cal_shift_busy Yes
Specifies the status of
calibration or shifting
operation. This signal is
asserted until the
calibration or shifting
operation is completed.
Output port [OCT_BLOCK_NUMBER - 1..0] wide
calibration_busy Yes
Specifies the status of the
calibration operation. This
signal is asserted until the
calibration operation is
completed.
Output port [OCT_BLOCK_NUMBER - 1..0] wide
paralleltermination
control
Yes
Specifies parallel
termination
Receives the current state of the pull-up and
pull-down transmitter control buses from a
termination logic block.
Output port [OCT_BLOCK_NUMBER * 13..0] wide
seriesterminationco
ntrol
Yes
Specifies the serial
termination
Receives the current state of the pull-up and
pull-down receiver control buses from a termination
logic block.
Output port [OCT_BLOCK_NUMBER * 13..0] wide