tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 385

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
23. On-chip Debug Function (OCD)
23.1 Features
23.2 Control Pins
Table 23-1 Pins Used for the On-chip Debug Function
OCDCK
OCDIO
RESET
MODE
VDD
VSS
Input and output ports other than
P20 and P21
XIN
XOUT
debug emulator RTE870/C1, the user is able to perform software debugging in the on-board environment. This emu-
lator can be operated from a debugger installed on a PC so that the emulation and debugging functions of an applica-
tion program can be used to modify a program or for other purposes.
nected to the on-chip debug function. For more detailed information on how to use the on-chip debug emulator
RTE870/C1, refer to the emulator operating manual.
trol. The pins used for the on-chip debug function are shown in Table 23-1.
emulator RTE870/C1 is used, therefore, the port functions and the functions of UART0 and SIO0, which are also
used as ports, cannot be debugged.
(during on-chip debugging)
The TMP89FM42 has an on-chip debug function. Using a combination of this function and the TOSHIBA on-chip
This chapter describes the control pins needed to use the on-chip debug function and how a target system is con-
The on-chip debug function of the TMP89FM42 has the following features:
The on-chip debug function uses two pins for communication and four pins for power supply, reset and mode con-
Ports P20 and P21 are used as communication control pins of the on-chip debug function. If the on-chip debug
Note 1: To use all on-chip debug functions, the power supply voltage must be within the range 4.5
• Debugging can be performed in much the same way as when a microcontroller packaged with the MCU is
• The debugging function can be realized using two communication control pins.
• Useful on-chip debug functions include the following:
• Built-in flash memory can be erased and written.
Pin name
used.
2.2 V to 4.5 V, functional limitations occur with some of the debug functions. For more detailed information, refer to the
emulator operating manual.
- 8 breaks function are provided (one of which can also be used as an event function).
- A trace function that allows the newest two branch instructions to be stored in real time is provided.
- Functions to display active memory and to overwrite active memory are provided.
Input/out-
supply
supply
Output
Power
Power
Input
Input
Input
Input
put
I/O
I/O
Communication control pin (clock control)
Communication control pin (data control)
Reset control pin
Mode control pin
4.5 V to 5.5 V (note 1)
0 V
Can be used for an application in a target system
To be connected to an oscillator to put these pins in a state of self-oscillation
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Function
(Note 1)
V to
5.5
P20 / TXD0 / SO0
P21 / RXD0 / SI0
RESET
MODE
V
. If it is within the range
(in MCU mode)
Pin name
TMP89FM42