M16C30P_07 Datasheet, PDF (41/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
5. Reset
Table 5.1 Pin Status When RESET Pin Level is “L”
Pin Name
Status
CNVSS = VSS
CNVSS = VCC1
BYTE = VSS
BYTE = VCC1
P0
Input port
Data input
Data input
P1
Input port
Data input
Input port
P2, P3, P4_0 to P4_3 Input port
Address output (undefined) Address output (undefined)
P4_4
Input port
CS0 output (“H” is output) CS0 output (“H” is output)
P4_5 to P4_7
Input port
Input port (Pulled high)
Input port (Pulled high)
P5_0
Input port
WR output (“H” is output)
WR output (“H” is output)
P5_1
Input port
BHE output (undefined)
BHE output (undefined)
P5_2
Input port
RD output (“H” is output)
RD output (“H” is output)
P5_3
Input port
BCLK output
BCLK output
P5_4
Input port
HLDA output (The output
HLDA output (The output
value depends on the input to value depends on the input to
the HOLD pin)
the HOLD pin)
P5_5
Input port
HOLD input
HOLD input
P5_6
Input port
ALE output (“L” is output)
ALE output (“L” is output)
P5_7
Input port
RDY input
RDY input
P6, P7, P8_0 to P8_4,
P8_6, P8_7, P9, P10 Input port
Input port
Input port
NOTES:
1. Shown here is the valid pin state when the internal power supply voltage has stabilized after power
on.
When CNVSS = VCC1, the pin state is indeterminate until the internal power supply voltage
stabilizes.
5.2 Software Reset
The microcomputer resets pins, the CPU and SFR when the PM03 bit in the PM0 register is set to “1”
(microcomputer reset). Then the microcomputer executes the program in an address determined by the reset vector.
Set the PM03 bit to “1” while the main clock is selected as the CPU clock and the main clock oscillation is stable.
In the software reset, the microcomputer does not reset a part of the SFR. Refer to 4. Special Function Register
(SFR) for details.
Processor mode remains unchanged since the PM01 to PM00 bits in the PM0 register are not reset.
Rev.1.22 Mar 29, 2007 Page 25 of 291
REJ09B0179-0122