Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

A.4.4.1.2. CSEL Settings for the SD/MMC Controller

Table 274.  SD/MMC Controller CSEL Pin Settings
Setting CSEL[1:0] Pin Value

0

1

2

3

osc1_clk (HPS1_CLK pin) range

10–50 MHz

10–12.5 MHz

12.5–25 MHz

25–50 MHz

ID mode

Device clock (sdmmc_cclk_out)

osc1_clk/512, 97.66 KHz max

osc1_clk/128, 97.66 KHz max

osc1_clk/256, 97.66 KHz max

osc1_clk/512, 97.66 KHz max

Controller baud rate divisor

32

32

32

32

Data transfer mode

Device clock (sdmmc_cclk_out)

osc1_clk/4, 12.5 MHz max

osc1_clk*1, 12.5 MHz max

osc1_clk/2, 12.5 MHz max

osc1_clk/4, 12.5 MHz max

Controller baud rate divisor (even numbers only)

1 (bypass)

1 (bypass)

1 (bypass)

1 (bypass)

Controller clock (sdmmc_clk)

osc1_clk,

50 MHz max

osc1_clk,

50 MHz max

osc1_clk,

50 MHz max

osc1_clk,

50 MHz max

mpu_clk

osc1_clk, 50 MHz max

osc1_clk*32, 400 MHz max

osc1_clk*16, 400 MHz max

osc1_clk*8, 400 MHz max

PLL modes

Bypassed

Locked

Locked

Locked