ddr3 200M??

Chip Platform Rockchip
1

shell@rk3288:/ $ DDR Version 1.00 20141007
In
Channel a: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Channel b: DDR3 200MHz
Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=16 Size=1024MB
Memory OK
Memory OK

???如何解释？

vga 800×600的显示质量不好是芯片不支持这种低端分辨率么

2

这个是loader跑的频率
linux是自动调节，看一下/sys/dvfs/dvfs_tree中：
<4>[ 860.654370] | |- power domain:pd_ddr, status = OFF, current volt = 1125000, current regu_mode = UNKNOWN
<4>[ 860.654491] | | |
<4>[ 860.654491] | | |- clock: clk_ddr current: rate 456000, volt = 1125000, enable_dvfs = ENABLE
<4>[ 860.654610] | | |- clk limit(enable):[200000000, 528000000]; last set rate = 456000
<4>[ 860.654684] | | | |- freq = 200000, volt = 1075000
<4>[ 860.654749] | | | |- freq = 300000, volt = 1075000
<4>[ 860.654812] | | | |- freq = 456000, volt = 1125000
<4>[ 860.654876] | | | |- freq = 528000, volt = 1150000
<4>[ 860.654948] | | |- clock: clk_ddr current: rate 456000, regu_mode = UNKNOWN, regu_mode_en = 0

VGA 800×600本身分辨率是比较低，会做scale到显示屏，所以效果肯定没那么好

3

我用好显示器测试没问题。