Target System Design - NEC QB-MINI2 User Manual

CHAPTER 6

6.1 Target System Design

This section describes the target system circuit design required for on-chip debugging and flash programming.
Figure 6-1 presents an overview of the MINICUBE2 communication interface.
figure, MINICUBE2 performs serial communication with the target device on the target system.
communication, communication circuits must be mounted on the target system.
circuits appropriately.
Target device Target device
Single-wire UART communication Single-wire UART communication
(1-wire/2-wire mode) (1-wire/2-wire mode)
Target system Target system
Note 1-wire mode: Single-wire UART communication using TOOL0 pin
2-wire mode: Single-wire UART communication using TOOL0 and TOOL1 pins
Table 6-1. Differences Between 1-Wire Mode and 2-Wire Mode
Communication
Mode
1-wire mode
2-wire mode
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HOW TO USE MINICUBE2 WITH 78K0R MICROCONTROLLER
Figure 6-1. Outline of Communication Interface
Communication circuits Communication circuits
must be mounted on must be mounted on
the target system. the target system.
Note Note
MINICUBE2 MINICUBE2
Flash Programming
Function
Available • Pseudo real-time RAM monitor (RRM) function:
Unavailable
• DMM function (writing to memory during RUN): Unavailable
Available • Pseudo real-time RAM monitor (RRM) function: Available
• DMM function (writing to memory during RUN): Available
User's Manual U18371EJ1V0UM
As shown on the left side of the
Refer to this section to design
USB USB
communication communication
Host machine Host machine
Debugging Function
For this