HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 161

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Areas 2–4 are always used as external memory space. The bus width is 8 bits when the A27 bit is
0 and 16 bits when it is 1. A23 and A22 bits are not output and the shadow is in 4-Mbyte units.
When areas 2–4 are accessed, the CS2, CS3, and CS4 signals are valid. Area 2 has a long wait
function, so between 1 and 4 states can be selected for the number of long waits inserted into the
bus cycle using bits A02LW1 and A02LW0 in WCR3.
H'A000000
H'A3FFFFF
H'A400000
H'A7FFFFF
H'A800000
H'ABFFFFF
H'AC00000
H'AFFFFFF
16-bit space
H'2000000
H'23FFFFF
H'2400000
H'27FFFFF
H'2800000
H'2BFFFFF
H'2C00000
H'2FFFFFF
Logical address space
Figure 8.7 Memory Map of Area 2
Shadow
Shadow
Shadow
Shadow
8-bit space
Rev. 7.00 Jan 31, 2006 page 135 of 658
Section 8 Bus State Controller (BSC)
• Valid addresses A21–A0
• CS2 valid
• Long wait function
(A23 and A22 not output)
memory space
Actual space
(4 Mbytes)
External
REJ09B0272-0700