HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 129

• Manufacturer Part Number: HD6413003RVF
• Description: microcontroller (MCU)
• Manufacturer: RENESAS [Renesas Technology Corp]

6.3.2 Chip Select Signals
For each of areas 0 to 7, the H8/3003 can output a chip select signal (CS
indicate when the area is selected. Figure 6-3 shows the output timing of a CSn signal.
Output of the CS
corresponding port. A reset leaves pin CS
state. To output chip select signals CS
For details see section 9, I/O Ports.
When the on-chip RAM and on-chip registers are accessed, CS
and LWR signals remain high. The CS
used as chip select signals for SRAM and other devices.
Address
CS
ø
n
n
signal is enabled or disabled in the data direction register (DDR) of the
Figure 6-3 CS
1
n
to CS
signals are decoded from the address signals. They can be
0
in the output state and pins CS
T
External address in area n
1
7
, the corresponding DDR bits must be set to 1.
111
n
Output Timing
T
2
7
goes low but the
T
3
0
1
to CS
to CS
7
) that goes low to
7
AS, RD, HWR,
in the input