z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 185

• Manufacturer Part Number: z8f0822
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022517-0508
Caution:
Figure 39. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface (2)
Figure 38. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface (1)
transmission is half-duplex, in that transmit and receive cannot occur simultaneously. The
serial data on the
RS-232. This pin can interface the Z8 Encore! XP F0822 Series products to the serial port
of a host PC using minimal external hardware.Two different methods for connecting the
DBG
RS-232 TX
RS-232 RX
pin to an RS-232 interface are displayed in
RS-232 TX
RS-232 RX
For operation of the OCD, all power pins (V
plied with power, and all ground pins (V
grounded. The
V
DD
through an external pull-up resistor to insure proper operation.
DBG
pin is sent using the standard asynchronous data format defined in
DBG
Transceiver
RS-232
Transceiver
pin is open-drain and must always be connected to
RS-232
Open-Drain
Buffer
Diode
Figure 38
SS
V
DD
and AV
DD
V
DD
Z8 Encore! XP
10 K
and AV
and
10K Ohm
SS
Ω
Figure
) must be properly
DBG Pin
Product Specification
DD
DBG Pin
) must be sup-
39.
®
On-Chip Debugger
F0822 Series
172