User manual

MPLAB
®
REAL ICE
™
In-Circuit Emulator User’s Guide
DS51616A-page 44 © 2006 Microchip Technology Inc.
The electrical specifications for logic probes are listed in Table 7-2.
7.6 STANDARD COMMUNICATION BOARD
For standard emulator communication with a target (Section 2.4.1 “Standard
Communication”), use the standard driver board.
The standard driver board is the main interface to the target processor. It contains the
connections to the high voltage (V
PP), VDD sense lines, and clock and data connections
required for programming and connecting with the target devices.
The V
PP high-voltage lines can produce a variable voltage that can swing from 14V
down to 0 volts to satisfy the voltage requirements for the specific emulation processor.
The V
DD sense connection draws very little current from the target processor. The
actual power comes from the MPLAB REAL ICE in-circuit emulation system as the V
DD
sense line is used as a reference only to track the target voltage. The V
DD connection
is isolated with an optical switch.
The clock and data connections are interfaces with the following characteristics.
• Clock and data signals are in high-impedance mode (even when no power is
applied to the MPLAB REAL ICE in-circuit emulator system)
• Clock and data signals are protected from high voltages caused by faulty targets
systems, or improper connections
• Clock and data signals are protected from high current caused from electrical
shorts in faulty target systems
FIGURE 7-2: 6-PIN STANDARD PINOUT
TABLE 7-2: LOGIC PROBE ELECTRICAL SPECIFICATIONS
Logic Inputs VIH = VDD x 0.7V (min)
VIL = VDD x 0.3V (max)
Logic Outputs V
DD = 5V VDD = 3V VDD = 2.3V VDD = 1.65V
V
OH = 3.8V min VOH = 2.4V min VOH = 1.9V min VOH = 1.2V min
VOL = 0.55V max VOL = 0.55V max VOL = 0.3V max VOL = 0.45V max
Note: When using the standard driver board, the rate for real-time streaming data
and tracing is limited to 20 MIPS.
1
2
3
4
5
6
Pin Name Function
1Vpp Power
2 Vdd_TGT Power on target
3 GND Ground
4 ICSPDAT Standard Com Data
5 ICSPCLK Standard Com Clock
6 AUX Auxiliary
Bottom of
Target Board
Standard Socket