Signal

Type

Description

SDRAM_CS_L

Input

Chip select signal from processor.

CMND_CYCL_REQ

Input

Command cycle request from SD_CONFIG module.

RFRSH_REQ

Input

Refresh request from SD_REFRESH module.

CLK

Input

Clock signal.

RST_L

Input

Reset signal.

SDRAM_CYCLE

Output

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

STATE_CNTR [3:0]

Output

State machine bits: indicates state of cycle.