MON166 User's Guide

Preliminary

Requirements

The MON166 Monitor has the following requirements:

• MCU compatible with 80C166, C161, C163, C164, C165, C167, or ST10.
• Software trap for breakpoints (NMI is typical).
• Ten (10) words of stack space in the user program being tested.
• 256 bytes of off-chip data memory (RAM).
• 5K bytes of off-chip code memory (ROM) loaded with the MON166 monitor. RAM may be used with the MCU in bootstrap mode.
• Serial interface. This may be the on-chip UART, a simulated UART (using two port pins), or an external UART (like the 16450 or 16550 used on standard PC's).
  
  MON166 requires only the TRANSMIT DATA and RECEIVE DATA RS-232/V.24 signals along with GROUND. In some cases, additional connections are necessary to enable communications (for example, loop-back connections for DTR, DSR, RTS, CTS, and DCD).
  
  Following are the required pins for standard connectors.
  
  

  Signal	DB25 Connector	DB9 Connector	Description
  RxD	3	2	Receive Data
  TxD	2	3	Transmit Data
  Gnd	7	5	Signal Ground