HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 336

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Precautions: Normal operation is not guaranteed if the boundary specified by PABR0 is higher
than that specified by PABR1. An example of this type is shown in figure 8.3. (Setting PABR0 to
00H and PABR1 to a value other than 00H may also disable normal operation.)
8.2.2
Wait control registers WCRL, WCRM, and WCRH specify the number of wait states to be
inserted each physical address areas and PAL, PAM, PAH.
Wait Control Register L (WCRL): Specifies the number of wait states to be inserted in a
memory cycle when the PAL area is accessed.
Rev. 0, 07/98, page 320 of 453
Wait Control Registers L, M, H (WCRL, WCRM, WCRH)
Physical address boundary
Physical address boundary
Physical address boundary
Physical address boundary
register 1 (PABR1)
register 0 (PABR0)
register 0 (PABR0)
register 1 (PABR1)
Figure 8.3 Incorrect Boundary Address Setting Example
Figure 8.2 Boundary Address Setting Examples (cont)
(d) Physical Address Partitioned into PAH, PAM and PAL
FFFFFFH
000000H
FFFFFFH
000000H
Physical address space
Physical address space
PAM area
PAH area
PAL area