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Z51F6412
Product Specification
PS030302-0212
P R E L I M I N A R Y
162
14.2.3 Connection of transmission
Two-pin interface connection uses open-drain (wire-AND bidirectional I/O).
DSCL
OUT
DSDA
OUT
DSDA
IN
DSCL(Debugger Serial Clock Line)
DSDA(Debugger Serial Data Line)
DSDA
OUT
DSDA
IN
Host Machine(Master)
Target Device(Slave)
VDD
VDD
Current source for DSCL to fast 0 to 1 transition in high speed mode
pull -up
resistors
Rp
Rp
VDD
DSCL
IN
DSCL
OUT
DSCL
IN
Start wait
start HIGH
Host PC
DSCL OUT
Target Device
DSCL OUT
DSCL
wait HIGH
Maximum
5 T
SCLK
Internal Operation
Acknowledge bit
transmission
minimum 1 T
SCLK
for next byte
transmission
Acknowledge bit
transmission
Minimum 500ns
Figure 14-7 Clock synchronization during wait procedure
Figure 14-8 Connection of transmission