Signal

Type

Description

SDRAM_EN

Input

SDRAM Enable signal.

CLK

Input

Clock signal.

RST_L

Input

Reset signal.

SDRAM_CYCLE [3:0]

Input

State machine bits: indicates the type of cycle: 00 = idle, 01 = command, 10 = data, 11 = refresh.

STATE_CNTR [3:0]

Input

State machine bits—indicates state of cycle.

SDRAM_MODE_REG [11:0]

Output

Mode Register Value.

SDRAM_CMND [1:0]

Output

SDRAM command desired: 00 = nop, 01 = precharge, 10 = autorefresh, 11 = load mode register.

CMND_CYCLE_REQ

Output

Command Cycle Request to state machine.

SDRAM_SETUP

Output

Indicates SDRAM setup is complete.