Filter
Top Products
( 24 / 42 )
Figure 3.4 Sample circuit of the SDI MCU control interface
The following must be observed in designing a target system when you connect the SDI MCU control
interface connector to the target system.
(1) Connect the target MCU so that it is the first device seen from the SDI MCU control interface
connector (JTAG connector).
(2) Keep the TMS separate so that operation from the emulator does not adversely effect other
devices.
(3) The TDO of the M32R Family MCU should be directly connected to the TDI (pin 4) of the
SDI MCU control interface connector.
(4) Do not use TRST as RST (MCU reset request).
When using the emulator, the emulator controls TRST and RST separately. Therefore, if the
two are tied together, the emulator will not function properly.
(5) Use a CR circuit or an open collector output device to generate the TRST and RST signals on
the target system without obstructing operation from the emulator. Do not connect devices
with totem-pole output.
Table 3.2 Parts of the SDI MCU control interface
Part No. Specification Remarks
Pull-up with VCCE power supply.
Pull-up is absolutely necessary for signal lines where a buffer IC
is inserted. It is not necessary for signal lines where a buffer IC
is not inserted.
Pull-up with VCCE power supply.
Pull-up is necessary whether a buffer IC is inserted or not.
It is logically unnecessary, but it is recommended to mount one
to stabilize operation.
Pull-down at GND.
Pull-down is absolutely necessary when a buffer IC (IC3) is
inserted. It is not necessary when a buffer IC is not inserted.
Resets the MCU's JTAG circuit when turned on.
1-2 connected: except when the emulator is connected
1-2 connected: when the emulator is connected
2-3 connected: when the emulator is not connected
R4, R5
IC1 to IC7
R3
J2
Resistor of 10 kΩ
Buffer IC
Resistor of 10 kΩ
Jumper pin
R1, R2, R6 Resistor of 10 kΩ
C1
J1
1 µF capacitor
Jumper pin
J1: Open when connecting the emulator, in other cases, 1-2 short
J2: 1-2 short when connecting the emulator, in other cases, 2-3 short