Datasheet

M16C
Target Setup for the FoUSB Programme
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REU05B0059-0101Z March 2004
Page 5 of 7
3.9 CNVss – Target MCU CNVss Pin
This active high signal is used by the ICD to control the target MCU’s CNVss pin for programming purposes. This
must be connected to the target MCU’s CNVss pin. During normal operation, this pin must have a low signal. To
accomplish this, connect a 10K (nominal) pull-down resistor. See M16C MCU datasheet on CNVss pin
description for details.
3.10 TXD – Target MCU Transmit Data Output Signal (ICD Receive Data Input Signal)
This is the ICD SIO receive data input. This must be connected to the target M16C MCU’s boot UART/SIO
transmit data output (TXD) pin.
This pin may be used for other applications as long as the user ensures that the ICD can drive the pin to valid
levels with 5mA current.
3.11 Hardware Summary and Precautions
• Connect pull-down resistors to the CNVss line.
• Connect Reset line to the target MCU Reset pin or the target board’s reset circuit.
• If EPM or CE lines are used as input pins, isolate the driving circuit from the 10-pin header using a 1Kohm
resistor.
• If possible, avoid using the boot SIO/UART pins for other purposes. If not, ensure the lines can be driven in
boot mode.
• Table 1 lists the M16C Flash MCU’s supported and corresponding CE or EPM pin support and the boot
UART/SIO.
Table 1 M16C MCU Support Summary
M16C MCU CE/EPM Pin Boot UART/SIO
M16C/10 None UART0
M30245FC Both UART1
M16C/26 CE UART1
M16C/28 CE UART1
M16C/29 CE UART1
M3062GF8N Both UART1
M16C/62P, 6N Both UART1
M306V7FG Both UART0
R8C/10, /11 None UART1