Note On Differences Between The Actual Mcu And Emulator - Renesas Emulation Pod M3062NT3-RPD-E User Manual

Note on Differences Between the Actual MCU and Emulator:

• Operation of the emulator differs from that of the actual MCU as listed below.
(1) Reset condition
(2) Initial values of MCU's internal resources at power-on
(3) Internal memories (ROM and RAM) capacities etc.
(4) Characteristics of ports P0 to P5
(5) Oscillator circuit
(6) A-D conversion function
(7) DBC, single-step and BRK instruction interrupt vector table addresses
(8) Address and status of BHE*
(9) Status of a data bus
(10) ALE signal
IMPORTANT
Set the time for starting up (0.2 Vcc to 0.8 Vcc) 1 µs or less.
With this emulator system, regardless of ROM and RAM of the MCU you use, all the areas
other than the SFR area can be read and written into.
Ports P0 to P5 are connected via emulation circuits. The device used for the port emulation
circuit is the IC21 (ALTERA EPF6016QC208-2).
• Make note that in the oscillator circuit where a resonator is connected between pins X
X , oscillation does not occur because a flexible cable, buffer IC and other devices are used
OUT
between the evaluation MCU and the target system. It is same for sub-clock oscillators (X
and X ).
COUT
• For notes on when using the oscillator circuit on the target system, refer to "3.3 (2) Using
the Oscillator Circuit on the Target System" (page 31).
As a flexible cable and other devices are used between the evaluation MCU and the target
system, some characteristics are slightly different from those of the actual MCU.
As the emulator uses the DBC, single-step and BRK instruction interrupt vector table
addresses, when reading these addresses, the downloaded data cannot be read (see Table 1.2).
Table 1.2 Vector table addresses for the emulator
Factor of interruption
1
DBC*
Single-step* 1
BRK instruction
*1 Interruption for the emulator only
When the internal RAM or ROM area of the MCU is accessed during user program execution,
the actual MCU retains a preceding address and status of BHE*, while this product does not.
In stop or wait mode, the actual MCU retains a preceding status of a data bus, while with this
product a data bus is floating.
When the internal RAM or SFR area of the MCU is accessed during user program execution,
with the actual MCU, ALE output is fixed to Low, while this product outputs ALE signal.
Vector table addresses
FFFF4h--FFFF7h
FFFECh--FFFEFh
FFFE4h--FFFE7h
( 18 / 84 )
Data read
Indefinite
Indefinite
Indefinite
and
IN
CIN