CXD5602 User Manual
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3.1.3
Switching between HOST I/F Select Function and SWD
Function
Once clock is provided to this block after Power-on Reset (POR) release, values of pin SYSTEM0 and pin
SYSTEM1 are held inside. A HOST I/F is selected from I2C, SPI, or UART in accordance with the held values.
Then, pin SYSTEM0 and pin SYSTEM1 are switched to SWD function.
Figure I/O Configuration-7 shows switching between HOST I/F Select function and SWD function.
CXD5602
Debugger
0
1
POR
Delay
0
1
SYSTEM0 (in)
SYSTEM1 (in/out)
SYSTEM0 (in)
SYSTEM1 (in)
Hold
SYSTEM0,1
SWD
control
HOSTIFC
I2C
UART
SPI
Hold SYSTEM0,1
CXD5602
Debugger
Host I/F
select signal
0
1
POR
Delay
0
1
Hold
SYSTEM0,1
SWD
control
HOSTIFC
I2C
UART
SPI
Select Host I/F
Switched to
SWD control
SYSTEM0,1
switched to SWD control
Host I/F
select signal
LL
HL
LH
LL
HL
LH
Figure I/O Configuration-7 Switching between HOST I/F Function and SWD Function
Table I/O Configuration-6 shows HOST I/F decided in accordance with the held values of pin SYSTEM0 and pin
SYSTEM1 after POR release.
Table I/O Configuration-6 HOST I/F Decided in Accordance with Pin SYSTEM{0,1}
Pin name
SYSTEM0=L
SYSTEM1=L
SYSTEM0=H
SYSTEM1=L
SYSTEM0=L
SYSTEM1=H
SYSTEM0=H
SYSTEM1=H
P00_00
I2C3_BCK
UART0_TXD
SPI2_CSX
-
P00_01
I2C3_BDT
UART0_RXD
SPI2_SCK
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P01_00
-
-
SPI2_MOSI
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P01_01
-
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SPI2_MISO
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Summary of Contents for CXD5602
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Page 36: ...CXD5602 User Manual 36 1010 2 3 Block Diagram Figure Block Diagram 1 CXD5602 Block Diagram ...
Page 144: ...CXD5602 User Manual 144 1010 GNSS_RAMMODE_SEL 0x3F000FFF SRAM GNSS BB 0 5 ON ...
Page 835: ...CXD5602 User Manual 835 1010 enable disable ...