UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 641

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

* Cycle specified by the RFT1 and RFT0 bits of the RFM
(a) Internal memory accesses
In the case of internal memory accesses in which the external pseudo-static RAM is not accessed, also, refresh
bus cycles are output at the intervals specified by the refresh mode (RFM) register so that the data stored in the
pseudo-static RAM is retained. In this case, CPU instruction execution is not affected.
Refresh Timing Counter
Figure 21-17 Pulse Refresh Operation in Internal Memory Access
REFRQ
Pin Output
CHAPTER 21 LOCAL BUS INTERFACE FUNCTION
Refresh Cycle*
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