Z51F3220FNX Datasheet, PDF (294/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
14.2.3 Connection of Transmission
Two-pin interface connection uses open-drain (wire-AND bidirectional I/O).
DSDA(Debugger Serial Data Line)
DSCL(Debugger Serial Clock Line)
pull -up
Rp
resistors
VDD
Rp
VDD
VDD
DSCL
OUT
DSCL
IN
DSDA
OUT
DSDA
IN
DSCL
OUT
DSCL
IN
DSDA
OUT
DSDA
IN
Host Machine(Master)
Target Device(Slave)
Current source for DSCL to fast 0 to 1 transition in high speed mode
Figure 14.8 Connection of Transmission
PS029902-0212
PRELIMINARY
292