Switching Between Host I/F Select Function And Swd Function - Sony CXD5602 User Manual

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.
Host I/F
select signal
Debugger
Delay
POR
Host I/F
select signal
Debugger
Delay
POR
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
P00_00 I2C3_BCK
P00_01 I2C3_BDT
P01_00 -
P01_01 -
CXD5602
SYSTEM0 (in)
0
SYSTEM1 (in)
1
CXD5602
SYSTEM0 (in)
0
SYSTEM1 (in/out)
1
Switched to
SWD control
SYSTEM0=H
SYSTEM1=L
UART0_TXD
UART0_RXD
-
-
－54/1010－
Hold
0
SYSTEM0,1
SWD
1
control
SYSTEM0,1
switched to SWD control
Hold
0
SYSTEM0,1
SWD
1
control
SYSTEM0=L
SYSTEM1=H
SPI2_CSX
SPI2_SCK
SPI2_MOSI
SPI2_MISO
CXD5602 User Manual
Hold SYSTEM0,1
HOSTIFC
I2C
LL
UART
HL
SPI
LH
Select Host I/F
HOSTIFC
I2C
LL
UART
HL
SPI
LH
SYSTEM0=H
SYSTEM1=H
-
-
-
-