CXD5602 User Manual
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3.7.4
I2C4
The I2C4 is the I2C master and supports Standard and Fast Mode.
3.7.4.1
Register List
TTable I2C-82 shows a register list of the I2C4.
Table I2C-74
I2C4 Register List
Address
Register Name
Type
Description
initial
Value
0x04106000
|
0x04106FFF
I2C4 registers (For details, refer to the API)
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3.7.4.2
Clock and Reset
Figure I2C-41 shows the clock and reset system of the I2C4.
Before accessing the I2C4 registers, make sure to set CKSEL_PMU.SEL_RTC_PCLK=1'b0 and
SYSIOP_CKEN.APB=1'b1.
SWRESET_BUS.XRST_PMU_I2CM
CK
GATE
ck_apb_gear
1/M
CKDIV_CPU_DSP_BUS.CK_AHB
0
3
2
1
RCOSC
XOSC
RTC_CLK_IN
(32.768kHz)
ck_cpu_bus
ck_rf_pll_1
SYSPLL
0
3
2
1
0
1
1/2
1/3
1/4
1/5
CKSEL_ROOT.RFPLL1_STAT_CLK_SEL4
CKSEL_ROOT.CPU_PLL_DIV5
I2C4
PCLK
I2CCLK
PRESETn
0
3
2
1
Reserved
PMU_CORE_CKEN.RTC_PCLK
CKSEL_PMU.SEL_RTC_PCLK
CKDIV_CPU_DSP_BUS.CK_M0
CKDIV_CPU_DSP_BUS.CK_APB
Auto(PWD_SUB Power Domain ON)
1/M
1/M
CKSEL_ROOT.STAT_CLK_SEL4
PMU_CORE_CKEN.PMU_RTC_PCLK
Figure I2C-41 I2C4 Clock and Reset System
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