UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 647

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

21.5 CAUTIONS
(1) When the bus hold function is used, the external wait function (access wait control performed by means of WAIT pin)
(2) The external wait function cannot be used when the bus hold function is used.
(3) The refresh function cannot be used when the bus hold function is used. In this case, ensure that refreshing is specified
(4) Do not set external wait for the internal ROM area. If external wait is set for the internal ROM area, the CPU is
(5) The pseudo-static RAM refresh function does not operate normally with an in-circuit emulator. Perform final check
cannot be used. 0, 1 or 2 waits must be selected for the entire space.
as disabled.
deadlocked. This deadlock status can be cleared only by reset input.
of the operations of a system using the pseudo-static RAM refresh function with the PD784026.
To debug the program logically, either map the pseudo-static RAM to the alternate memory of the in-circuit emulator,
or replace the pseudo-static RAM On the target board with a static RAM.
CHAPTER 21 LOCAL BUS INTERFACE FUNCTION
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