CXD5602 User Manual
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3.8.7.2
Clock and Reset
Figure DMAC-48 shows the clock and reset system diagram of the ADMAC.
ADMAC
HCLK
HRESETn
CK_APP
CK
GATE
CK_GATE_AHB.ck_gate_dmac
RESET.xrs_dsp_gen
0
3
2
1
RCOSC
SYSPLL
XOSC
RTC_CLK_IN(32.768kHz)
0
3
2
1
0
1
1/2
1/3
1/4
1/5
PWD_RESET0.PWD_APP
APP_CKSEL.APP_PLL_DIV5
CK
GATE
APP_CKEN.APP
IDMAC
HCLK
HRESETn
CK
GATE
RST_APP_X
CK_GATE_AHB.ck_gate_img
RESET.xrs_img
N/M
GEAR_AHB.gear_m_ahb
GEAR_AHB.gear_n_ahb
APP_CKSEL.STAT_APP_CLK_SEL4
APP_CKSEL.STAT_SP_CLK_SEL4
Figure DMAC-48 ADMAC Clock and Reset System
3.8.7.3
Clock Supply Start and Stop
3.8.7.3.1
Clock Supply Start
Perform the following control to start supplying the HCLK clock of the ADMAC.
1.
Reset release
PWD_RESET0.PWD_APP
=1'b1
RESET.xrs_dsp_gen
=1'b1
2.
Supply the CK_APP (Refer to APP (Chapter 3.13))
3.
AHB bus clock supply and division ratio setting
GEAR_AHB.gear_m_ahb
= (arbitrary: denominator setting of the division ratio)
GEAR_AHB.gear_n_ahb
= (arbitrary: numerator setting of the division ratio)
CK_GATE_AHB.ck_gate_dmac
=1'b1
3.8.7.3.2
Clock Supply Stop
Perform the following control to stop supplying the HCLK clock of the ADMAC.
1.
AHB bus clock stop
CK_GATE_AHB.ck_gate_dmac
=1'b0
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