UPD784938 Datasheet, PDF (574/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 23 INTERRUPT FUNCTIONS
23.8.7 Macro service type B
(1) Operation
Data transfers are performed between a data area in memory and an SFR specified by the macro service channel.
With type B, the data transfer direction can be selected as memory-to-SFR or SFR-to-memory.
Data transfers are performed the number of times set beforehand in the macro service counter. One macro service
processing transfers 8-bit or 16-bit data.
This type of macro service is macro service type A for general purposes and is ideal for processing a large amount
of data because up to 64 Kbytes of data buffer area when 8-bit data is transferred or 1 Mbyte of data buffer area when
16-bit data is transferred can be set in any address space.
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Preliminary User’s Manual U13987EJ1V0UM00