Z8FMC16100 Datasheet, PDF (264/402 Pages) Zilog, Inc. – Z8 Encore-R Motor Control Flash MCUs

Z8 Encore!^® Motor Control Flash MCUs
Product Specification
242
receives data. Data transmission is half-duplex, in that transmit and receive cannot occur
simultaneously. The serial data on the DBG pin is sent using the standard asynchronous
data format defined in RS-232. This pin interfaces the Z8FMC16100 Series Flash MCU
device to the serial port of a host PC using minimal external hardware. Two different
methods for connecting the DBG pin to an RS-232 interface are depicted in Figures 42
and 43 .
Caution: For operation of the Z8FMC16100 Series Flash MCU, all power pins (V_DD and AV_DD)
must be supplied with power, and all ground pins (V_SS and AV_SS) must be properly
grounded. The DBG pin should always be connected to V_DD through an external pull-
up resistor.
RS-232
Transceiver
RS232 TX
V_DD
Diode
10K‰
DBG pin
RS232 RX
Figure 42. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface (1)
V_DD
RS-232
Transceiver _Open-Drain
Buffer
RS232 TX
10K‰
DBG pin
RS232 RX
Figure 43. Interfacing the On-Chip Debugger’s DBG Pin with an RS-232 Interface (2)
On-Chip Debugger
PRELIMINARY
PS024604-1005