R01UH0136EJ0210 Rev.2.10
Page 50 of 800
Jul 31, 2012
M16C/64A Group
6. Resets
6.4
Operations
6.4.1
Status after Reset
The status of SFRs after reset depends on the reset type. See the Reset Value column in 4. “Special
Function Registers (SFRs)”. Table 6.7 lists Pin Status When
Pin Level is Low, Figure 6.2 shows
CPU Register Status after Reset, and Figure 6.3 shows Reset Sequence.
Table 6.7
Pin Status When
RESET
Pin Level is Low
Notes:
1.
The pin status shown here is when the internal power supply voltage has stabilized after power-on.
The pin status is undefined until td(P-R) has elapsed after power-on.
2.
Input a high-level signal.
3.
Input a low-level signal.
Pin Name
Status
Single-chip mode
(CNVSS = VSS)
Microprocessor mode (CNVSS = VCC1, P5_5 = high)
Boot mode
(CNVSS = VCC1,
P5_5 = low,
P5_0 = high)
BYTE = VSS
BYTE = VCC1
P0
Input port
Data input
Data input
Input port
P1
Input port
Data input
Input port
Input port
P2, P3, P4_0
to P4_3
Input port
Address output (undefined)
Address output (undefined)
Input port
P4_4
Input port
CS0
output
(high level is output)
CS0
output
(high level is output)
Input port
P4_5 to P4_7
Input port
Input port (pulled high)
Input port (pulled high)
Input port
P5_0
Input port
WR
output
(high level is output)
WR
output
(high level is output)
CE
input
(2)
P5_1
Input port
BHE
output (undefined)
BHE
output (undefined)
Input port
P5_2
Input port
RD
output
(high level is output)
RD
output
(high level is output)
Input port
P5_3
Input port
BCLK output
BCLK output
Input port
P5_4
Input port
HLDA
output
(the output value depends on
the input to the
HOLD
pin)
HLDA
output
(the output value depends on
the input to the
HOLD
pin)
Input port
P5_5
Input port
HOLD
input
(2)
HOLD
input
(2)
EPM
input
(3)
P5_6
Input port
ALE output
(low level is output)
ALE output
(low level is output)
Input port
P5_7
Input port
RDY
input
RDY
input
Input port
P6 to P10
Input port
Input port
Input port
Input port
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