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Adjust delay time

This commit is contained in:
Joshua Tyler 2020-06-06 16:37:18 +01:00
parent 0af97a8a94
commit d114963f0e
1 changed files with 4 additions and 3 deletions
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7
picosoc/spimemio.v
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@ -204,7 +204,7 @@ module spimemio (
reg [3:0] state; reg [3:0] state;
reg [9:0] wakeup_ctr; reg [11:0] wakeup_ctr;
always @(posedge clk) begin always @(posedge clk) begin
xfer_resetn <= 1; xfer_resetn <= 1;
@ -270,8 +270,9 @@ module spimemio (
// SPI flash chips that support power-down typically require // SPI flash chips that support power-down typically require
// some time to wake up before they can respond to commands // some time to wake up before they can respond to commands
// (e.g. 3us For W25Q128JVSIM) // (e.g. 3us For W25Q128JVSIM)
// This counter wastes 1024 clock cyles // (e.g. 30us For MT25QL128ABA1ESE-0SIT)
// This is 102.4us at 10MHz, and 5.12us at 200MHz // This counter wastes 2^12 clock cyles
// I.E. 41us at 100MHz, and 410us at 10MHz
// This range should cover all conceivable use cases // This range should cover all conceivable use cases
if(&wakeup_ctr) begin if(&wakeup_ctr) begin
state <= 5; state <= 5;