UPD784938 Datasheet, PDF (571/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 23 INTERRUPT FUNCTIONS
(2) Macro service channel configuration
The channel pointer and 8-bit macro service counter (MSC) indicate the buffer address in internal RAM (FE00H to
FEFFH when the LOCATION 0 instruction is executed, or FFE00H to FFEFFH when the LOCATION 0FH instruction
is executed) which is the transfer source or transfer destination (see Figure 23-23). In the channel pointer, the low-
order 8 bits of the address are written to the macro service counter in the macro service channel.
The SFR involved with the access is specified by the SFR pointer (SFRP). The low-order 8 bits of the SFR address
are written to the SFRP.
Preliminary User’s Manual U13987EJ1V0UM00
571