Table 1.3 Differences of outputs between actual MCUs and this product (when executing program)
Access area
Signal
Address
BHE*
Data
SFR area
RD*
(MAP = EXT)
WR*
CS*
ALE
Address
BHE*
Data
RD*
Internal RAM
WR*
Internal ROM
CS*
ALE
Address
BHE*
Data
External area
RD*
WR*
CS*
ALE
IMPORTANT
Actual MCU
Outputs
Outputs
(floating during read cycle)
Outputs
("L" output at write cycle,
"L" output at read cycle)
Does not output
(fixed to "H" output)
Does not output
(fixed to "L" output)
Retains previous status
Floating
Does not output
(fixed to "H" output)
Does not output
(fixed to "H" output)
Does not output
(fixed to "L" output)
Outputs
Outputs
(inputs external data at read cycle)
Outputs
("L" output at write cycle,
"L" output at read cycle)
Outputs
Outputs
( 18 / 76 )
This product
Outputs
Floating
Does not output
(fixed to "H" output)
Does not output
(fixed to "H" output)
Outputs
Outputs
Floating
Does not output
(fixed to "H" output)
Does not output
(fixed to "H" output)
Outputs
Outputs
Outputs
(inputs external data at read cycle)
Outputs
("L" output at write cycle,
"L" output at read cycle)
Outputs
Outputs
∗ for difference
∗
∗
∗
∗
∗