MEDIATEK Ralink MT7620 - Cpu Clock Mux

PGMT7620_V.1.0_040503
Page 15 of 523
MT7620 PROGRAMMING GUIDE
Integrated 802.11n MAC/BBP and 2.4 GHz RF/FEM Router-on-a-Chip
1.5 CPU Clock Mux
BBP
PLL
CPU
PLL
/3
/4
Crystal
/2
480 MHz
20/40 MHz
CPU_CLK
SYS_CLK
600 MHz
Fractional
Clock
Generator
DRAM_CLK
CPU_SYS_CLKCFG: (offset: 0x003C)
CPU_CLK_AUX0
CPU_CLK_AUX1
0
1
0
1
CPLL_CFG0: (offset: 0x0054)
CPLL_CFG1: (offset: 0x0058)
Figure 1-3 CPU Clock Mux